update to version JAN_06 with all sources

svn path=/trunk/externals/iem/iem_bin_ambi/; revision=4666

18 files changed, 7330 insertions, 94 deletions

diff --git a/LICENSE.txt b/LICENSE.txt
index 089a646..ad4e05a 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,21 +1,27 @@
-iem_bin_ambi - binaural ambisonic rendering
+iem_bin_ambi - binaural ambisonic decoder rendering
 
-Copyright (C) 2000-2006 Thomas Musil (musil AT iem DOT at)
+Copyright (C) 2000-2006 Thomas MUSIL [musil_at_iem.at]
 
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
- 
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+IEM - Institute of Electronic Music and Acoustics, Graz
+Inffeldgasse 10/3, 8010 Graz, Austria
+http://iem.at
 
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
-In the official flext distribution, the GNU General Public License is
-in the file GnuGPL.txt
 
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details ( GnuGPL.txt ).
+      (e.g.  http://www.gnu.org/copyleft/gpl.html)
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+         Graz, 15 June 2005
+            Thomas Musil
\ No newline at end of file
diff --git a/READ_ME.txt b/READ_ME.txt
new file mode 100644
index 0000000..4264054
--- /dev/null
+++ b/READ_ME.txt
@@ -0,0 +1,6 @@
+This library extends the performance of miller puckette's pure data (pd).
+
+iem_bin_ambi contains 2 objects: 
+"bin_ambi_reduced_decode_fft2" and "bin_ambi_reduced_decode_fir2" 
+which calculate the product of an ambisonic decoder-matrix and the binaural HRIR's. 
+(in frequency and in time domain)
diff --git a/help/L0e045a.wav b/help/L0e045a.wav
new file mode 100644
index 0000000..eab0f9f
--- /dev/null
+++ b/help/L0e045a.wav
diff --git a/help/L0e135a.wav b/help/L0e135a.wav
new file mode 100644
index 0000000..3926f3e
--- /dev/null
+++ b/help/L0e135a.wav
diff --git a/help/L0e225a.wav b/help/L0e225a.wav
new file mode 100644
index 0000000..a182570
--- /dev/null
+++ b/help/L0e225a.wav
diff --git a/help/L0e315a.wav b/help/L0e315a.wav
new file mode 100644
index 0000000..a5af5f9
--- /dev/null
+++ b/help/L0e315a.wav
diff --git a/help/ambi_reduced_decode_fft2-help.pd b/help/ambi_reduced_decode_fft2-help.pd
new file mode 100644
index 0000000..d0a1260
--- /dev/null
+++ b/help/ambi_reduced_decode_fft2-help.pd
@@ -0,0 +1,241 @@
+#N canvas 90 10 884 683 10;
+#X text 795 99 1.arg: <float> ambisonic order;
+#X text 880 255 ambisonic-order = n_ao;
+#X text 1068 330 ambisonic-order-group;
+#X text 856 371 -90 <= delta <= +90;
+#X text 856 383 -180 <= phi <= +180;
+#X text 797 330 input: <ambi_weight> one mul-factor for each;
+#X text 797 279 input: <ls> index + phi [degree] .. 2-dimensional;
+#X text 797 289 input: <ls> index + delta + phi [degree] .. 3-dimensional
+;
+#X text 797 303 input: <phls> index + phi [degree .. 2-dimensional
+;
+#X text 797 314 input: <phls> index + delta + phi [degree] .. 3-dimensional
+;
+#X text 821 461 <float> n_col = (2*n_ao+1) = number of ambisonic-channels
+;
+#X text 809 470 + <float> n_row = (n_ls) = number of loudspeakers;
+#X text 1049 256 number of loudspeakers = n_ls;
+#X text 812 530 + <float> n_row = (n_ls) = number of loudspeakers;
+#X text 797 511 output in case of 3d: <matrix> ((n_ao+1)*(n_ao+1)*n_ls+2)
+;
+#X text 795 450 output in case of 2d: <matrix> ((2*n_ao+1)*n_ls+2)
+;
+#X text 1142 511 <float> :;
+#X text 1099 449 <float> :;
+#X text 1039 521 number of ambisonic-channels;
+#X text 824 521 <float> n_col = (n_ao+1)*(n_ao+1) =;
+#X text 1010 540 <float> elements of a matrix;
+#X text 812 540 + (n_ao + 1) * (n_ao + 1) * n_ls;
+#X text 809 480 + (2*n_ao + 1) * n_ls <float> elements of a matrix
+;
+#X text 790 403 input: <pinv> calculates the pseudo-inverse of the
+encoded;
+#X text 846 414 loudspeaker-positions (+ the phantom-speakers);
+#X text 860 425 and output a matrix-message;
+#X text 871 360 1 <= index <= n_ao;
+#X text 885 211 a regular matrix to inverse it);
+#X text 958 342 to suppress the side-lobe-phenomena;
+#X text 808 201 (it is sometimes necessary to add phantom-ls. for achieving
+;
+#X text 810 117 (1 .. 5 in case of 3 dimensional);
+#X text 810 108 (1 .. 12 in case of 2 dimensional);
+#X text 796 139 3.arg: <float> number of independent loudspeakers;
+#X text 795 127 2.arg: <float> dimension (2 or 3);
+#X text 795 190 5.arg: <float> number of canceled phantom_loudspeakers
+;
+#X text 796 151 4.arg: <float> number of merged and mirrored loudspeakers
+;
+#X text 842 164 (the merged loudspeakers are at the border of the arc
+;
+#X text 855 176 or the hemisphere \, the mirrored loudspeakers are
+;
+#X obj 18 350 soundfiler;
+#X obj 27 188 unpack s s;
+#X msg 18 329 read -skip \$1 \$2 \$3;
+#X obj 358 278 pp element;
+#X obj 45 284 mergefilename /;
+#X text 357 316 multiplexer control indices;
+#X text 353 327 for spec2_matrix_bundle_stat~;
+#X text 423 76 1.arg: <float> unique-number used as table-name-prefix
+;
+#X text 423 86 2.arg: <symbol> left HRIR-table-name;
+#X text 423 96 3.arg: <symbol> real HRTF-table-name;
+#X text 423 106 4.arg: <symbol> imag HRTF-table-name;
+#X text 423 116 5.arg: <symbol> HRIR-fadeout-window-table-name;
+#X obj 18 308 pack f s s;
+#X text 423 126 6.arg: <float> ambisonic order;
+#X text 423 136 7.arg: <float> ambisonic dimension;
+#X text 423 146 8.arg: <float> number of real loudspeakers;
+#X text 423 156 9.arg: <float> number of phantom loudspeakers;
+#X text 417 166 10.arg: <float> FFT-size = 2 x effective HRIR-length
+;
+#X obj 94 108 bin_ambi_reduced_decode_fft2 \$0 HRIR HRTF_re HRTF_im
+fadeout 1 2 4 0 256;
+#X obj 14 473 table \$0_fadeout 256;
+#X obj 45 236 symbol .;
+#X obj 27 211 t b b s;
+#X obj 45 258 pack s s;
+#X obj 18 245 f 0;
+#X obj 94 60 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
+-1;
+#X obj 357 299 print;
+#X obj 13 387 table \$0_1_HRIR 256;
+#X obj 249 382 table \$0_1_HRTF_re 256;
+#X obj 389 382 table \$0_1_HRTF_im 256;
+#X obj 13 447 table \$0_4_HRIR 256;
+#X obj 13 427 table \$0_3_HRIR 256;
+#X obj 13 407 table \$0_2_HRIR 256;
+#X obj 249 402 table \$0_2_HRTF_re 256;
+#X obj 249 422 table \$0_3_HRTF_re 256;
+#X obj 389 422 table \$0_3_HRTF_im 256;
+#X obj 389 402 table \$0_2_HRTF_im 256;
+#N canvas 26 6 959 718 input_messages 0;
+#X obj 42 641 outlet;
+#X text 33 659 to bin_ambi_reduced_decode;
+#X msg 715 529 calc_reduced \$1;
+#X msg 372 418 calc_pinv;
+#X msg 444 454 check_HRIR_arrays \$1;
+#X msg 581 491 check_HRTF_arrays \$1;
+#X msg 818 545 calc_sym;
+#X obj 134 154 pp pht_ls;
+#X obj 64 110 pp real_ls;
+#X obj 23 60 pp load_HRIR;
+#X obj 444 434 for++ 1 4 10;
+#X obj 444 414 del 10;
+#X obj 581 451 del 10;
+#X obj 581 471 for++ 1 3 10;
+#X obj 715 488 del 10;
+#X obj 715 508 for++ 1 3 10;
+#X obj 818 525 del 10;
+#X msg 23 37 1 L0e045a.wav \, 2 L0e135a.wav \, 3 L0e225a.wav \, 4 L0e315a.wav
+;
+#X obj 197 202 pp ipht_ireal_muladd;
+#X obj 294 336 pp ambi_weight;
+#X obj 240 271 pp sing_range;
+#X msg 134 134 1 -90 0;
+#X msg 240 251 1e-010;
+#X text 403 31 <list> : <float> loudspeaker-index + <symbol> left-ear-HRIR-wav
+\, index beginning with one;
+#X text 272 81 <list> : <float> loudspeaker-index + <float> elevation
+in degree + <float> azimuth in degree \, index beginning with one \,
+elevation geodetical \, azimuth counterclockwise positiv;
+#X text 699 37 list of HRIRs;
+#X text 645 93 list of the real loudspeaker-coordinates;
+#X text 570 147 list of the phantom loudspeaker-coordinates;
+#X text 200 130 <list> : <float> loudspeaker-index + <float> elevation
+in degree + <float> azimuth in degree \, index beginning with one \,
+elevation geodetical \, azimuth counterclockwise positiv;
+#X msg 197 181 1 4 0.707;
+#X text 330 170 <list> : <float> phantom-loudspeaker-index + <float>
+real-loudspeaker-index + <float> mirror-weight \, both index beginning
+greater zero \, mul-factor should be the cosine of the elevation-angle-difference
+;
+#X text 326 239 <float> singularity-range: when calculating the inverse
+of the loudspeaker-matrix \, we use gauss-algorithm. if we divide a
+matrix-element by a number less then this range \, we say \, this matrix
+is not regulary.;
+#X obj 372 397 del 10;
+#X obj 323 292 del 10;
+#X obj 116 63 del 10;
+#X obj 24 7 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1 -1
+;
+#X msg 305 314 1 1;
+#X obj 65 4 inlet;
+#X msg 64 90 1 45 \, 2 135 \, 3 225 \, 4 315;
+#X text 156 74 this is 2-d case;
+#X connect 2 0 0 0;
+#X connect 3 0 0 0;
+#X connect 4 0 0 0;
+#X connect 5 0 0 0;
+#X connect 6 0 0 0;
+#X connect 7 0 0 0;
+#X connect 8 0 0 0;
+#X connect 9 0 0 0;
+#X connect 10 0 4 0;
+#X connect 10 1 12 0;
+#X connect 11 0 10 0;
+#X connect 12 0 13 0;
+#X connect 13 0 5 0;
+#X connect 13 1 14 0;
+#X connect 14 0 15 0;
+#X connect 15 0 2 0;
+#X connect 15 1 16 0;
+#X connect 16 0 6 0;
+#X connect 17 0 9 0;
+#X connect 18 0 0 0;
+#X connect 19 0 0 0;
+#X connect 20 0 0 0;
+#X connect 21 0 7 0;
+#X connect 22 0 20 0;
+#X connect 29 0 18 0;
+#X connect 32 0 3 0;
+#X connect 32 0 11 0;
+#X connect 33 0 32 0;
+#X connect 33 0 36 0;
+#X connect 34 0 38 0;
+#X connect 34 0 33 0;
+#X connect 35 0 17 0;
+#X connect 35 0 34 0;
+#X connect 36 0 19 0;
+#X connect 37 0 35 0;
+#X connect 38 0 8 0;
+#X restore 94 83 pd input_messages;
+#X text 21 12 ambi_reduced_decode_fft2;
+#X text 215 9 calculates a reduced set of HRTF-spectras;
+#N canvas 0 0 461 380 init 0;
+#X obj 124 23 loadbang;
+#X obj 124 45 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
+-1;
+#X obj 124 73 for++ 0 127;
+#X obj 124 144 t b;
+#X msg 124 164 1;
+#X obj 124 123 moses 95;
+#X obj 167 144 - 95;
+#X obj 167 166 / 32;
+#X obj 167 220 * 3.14159;
+#X obj 167 264 t f f;
+#X obj 172 286 *;
+#X obj 172 317 tabwrite \$0_fadeout;
+#X obj 270 162 + 128;
+#X msg 270 185 0 \$1;
+#X obj 153 97 t f f f;
+#X obj 167 241 cos;
+#X obj 167 199 / 2;
+#X connect 0 0 1 0;
+#X connect 1 0 2 0;
+#X connect 2 0 14 0;
+#X connect 3 0 4 0;
+#X connect 4 0 11 0;
+#X connect 5 0 3 0;
+#X connect 5 1 6 0;
+#X connect 6 0 7 0;
+#X connect 7 0 16 0;
+#X connect 8 0 15 0;
+#X connect 9 0 10 0;
+#X connect 9 1 10 1;
+#X connect 10 0 11 0;
+#X connect 12 0 13 0;
+#X connect 13 0 11 0;
+#X connect 14 0 5 0;
+#X connect 14 1 11 1;
+#X connect 14 2 12 0;
+#X connect 15 0 9 0;
+#X connect 16 0 8 0;
+#X restore 92 496 pd init;
+#X connect 39 0 59 0;
+#X connect 39 1 50 2;
+#X connect 40 0 38 0;
+#X connect 41 0 63 0;
+#X connect 42 0 50 1;
+#X connect 50 0 40 0;
+#X connect 56 0 39 0;
+#X connect 56 1 41 0;
+#X connect 58 0 60 0;
+#X connect 59 0 61 0;
+#X connect 59 1 58 0;
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+#X connect 60 0 42 0;
+#X connect 61 0 50 0;
+#X connect 62 0 74 0;
+#X connect 74 0 56 0;
diff --git a/src/bin_ambi_calc_HRTF.c b/src/bin_ambi_calc_HRTF.c
index 57460b3..d9e8ee3 100644
--- a/src/bin_ambi_calc_HRTF.c
+++ b/src/bin_ambi_calc_HRTF.c
@@ -1,7 +1,7 @@
 /* For information on usage and redistribution, and for a DISCLAIMER OF ALL
 * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
 
-iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
 
 #ifdef NT
 #pragma warning( disable : 4244 )
@@ -69,7 +69,7 @@ static void bin_ambi_calc_HRTF_init_cos(t_bin_ambi_calc_HRTF *x)
 	{
 		f = g * (float)i;
 		(*sincos).real = cos(f);
-		(*sincos).imag = sin(f);/*change*/
+		(*sincos).imag = -sin(f);/*FFT*/
 		sincos++;
 	}
 }
diff --git a/src/bin_ambi_reduced_decode.c b/src/bin_ambi_reduced_decode.c
index 8626473..bce4f83 100644
--- a/src/bin_ambi_reduced_decode.c
+++ b/src/bin_ambi_reduced_decode.c
@@ -1,7 +1,7 @@
 /* For information on usage and redistribution, and for a DISCLAIMER OF ALL
 * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
 
-iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
 
 #ifdef NT
 #pragma warning( disable : 4244 )
@@ -88,7 +88,7 @@ static void bin_ambi_reduced_decode_init_cos(t_bin_ambi_reduced_decode *x)
 	{
 		f = g * (float)i;
 		(*sincos).real = cos(f);
-		(*sincos).imag = sin(f);/*change*/
+		(*sincos).imag = -sin(f);/*FFT*/
 		sincos++;
 	}
 }
@@ -741,7 +741,7 @@ static void bin_ambi_reduced_decode_check_arrays(t_bin_ambi_reduced_decode *x, f
 
 		if(npoints < fftsize)
 		{
-			post("warning: %s-array-size: %d", hrir->s_name, npoints);
+			post("bin_ambi_reduced_decode-WARNING: %s-array-size: %d < FFT-size: %d", hrir->s_name, npoints, fftsize);
 		}
 		vec = x->x_beg_hrir;
 		vec += index * fftsize;
@@ -858,16 +858,18 @@ static void bin_ambi_reduced_decode_calc_reduced(t_bin_ambi_reduced_decode *x, f
 			val[i] = old1;
 		}
 	}
-
-	vec_hrtf_re[0] = val[0].real;
-	vec_hrtf_im[0] = 0.0f;
-	for( i = 1; i < fs2; i++ )
+	for(i = 0; i<fs2; i++)
 	{
-		vec_hrtf_re[i] = 2.0f*val[i].real;
-		vec_hrtf_im[i] = 2.0f*val[i].imag;
+		vec_hrtf_re[i] = val[i].real;
+		vec_hrtf_im[i] = val[i].imag;
 	}
-	vec_hrtf_re[fs2] = 0.0f;
+	vec_hrtf_re[fs2] = val[fs2].real;
 	vec_hrtf_im[fs2] = 0.0f;
+	for(i = fs2+1; i < fftsize; i++)
+	{
+		vec_hrtf_re[i] = 0.0f;
+		vec_hrtf_im[i] = 0.0f;
+	}
 }
 
 static void bin_ambi_reduced_decode_decoding(t_bin_ambi_reduced_decode *x)
@@ -1031,7 +1033,7 @@ static void bin_ambi_reduced_decode_ambi_weight(t_bin_ambi_reduced_decode *x, t_
 		}
 	}
 	else
-		post("bin_ambi_reduced_decode-ERROR: ambi_weight needs %d float weights", x->x_n_order);
+		post("bin_ambi_reduced_decode-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
 }
 
 static void bin_ambi_reduced_decode_sing_range(t_bin_ambi_reduced_decode *x, t_floatarg f)
@@ -1081,12 +1083,12 @@ static void *bin_ambi_reduced_decode_new(t_symbol *s, int argc, t_atom *argv)
 {
 	t_bin_ambi_reduced_decode *x = (t_bin_ambi_reduced_decode *)pd_new(bin_ambi_reduced_decode_class);
 	char buf[400];
-	int i, j, fftok;
-	int n_order, n_dim, n_ambi, fftsize, prefix;
-	t_symbol	*s_hrir;
-	t_symbol	*s_hrtf_re;
-	t_symbol	*s_hrtf_im;
-  t_symbol  *s_fade_out_hrir;
+	int i, j, fftok, ok=0;
+	int n_order=0, n_dim=0, n_ambi=0, fftsize=0, prefix=0;
+	t_symbol	*s_hrir=gensym("L_HRIR");
+	t_symbol	*s_hrtf_re=gensym("HRTF_re");
+	t_symbol	*s_hrtf_im=gensym("HRTF_im");
+  t_symbol  *s_fade_out_hrir=gensym("HRIR_win");
 
 	if((argc >= 8) &&
 		IS_A_FLOAT(argv,0) &&
@@ -1109,6 +1111,34 @@ static void *bin_ambi_reduced_decode_new(t_symbol *s, int argc, t_atom *argv)
 		n_dim		= (int)atom_getintarg(6, argc, argv);
 		fftsize	= (int)atom_getintarg(7, argc, argv);
 
+		ok = 1;
+	}
+	else if((argc >= 8) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_FLOAT(argv,1) &&
+		IS_A_FLOAT(argv,2) &&
+		IS_A_FLOAT(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= gensym("L_HRIR");
+		s_hrtf_re							= gensym("HRTF_re");
+		s_hrtf_im							= gensym("HRTF_im");
+		s_fade_out_hrir	      = gensym("HRIR_win");
+
+		n_order	= (int)atom_getintarg(5, argc, argv);
+		n_dim		= (int)atom_getintarg(6, argc, argv);
+		fftsize	= (int)atom_getintarg(7, argc, argv);
+
+		ok = 1;
+	}
+
+	if(ok)
+	{
 		if(n_order < 1)
 			n_order = 1;
 
@@ -1141,7 +1171,8 @@ static void *bin_ambi_reduced_decode_new(t_symbol *s, int argc, t_atom *argv)
 		if(!fftok)
 		{
       fftsize = 512;
-			post("bin_ambi_reduced_decode-ERROR: fftsize not equal to 2 ^ n !!!");
+			post("bin_ambi_reduced_decode-WARNING: fftsize not equal to 2 ^ n !!!");
+			post("                                 fftsize set to %d", fftsize);
 		}
 
 		x->x_n_dim			= n_dim;
@@ -1211,8 +1242,8 @@ static void *bin_ambi_reduced_decode_new(t_symbol *s, int argc, t_atom *argv)
 	else
 	{
 		post("bin_ambi_reduced_decode-ERROR: need 1 float + 4 symbols + 3 floats arguments:");
-		post("  prefix + hrir_name + hrtf_re_name + hrtf_im_name + hrir_fade_out_name +");
-		post("  ambi_order + ambi_dimension + fftsize");
+		post("  prefix(unique-number) + hrir_name + hrtf_re_name + hrtf_im_name + hrir_fade_out_name +");
+		post("   + ambi_order + ambi_dimension + fftsize");
 		return(0);
 	}
 }
diff --git a/src/bin_ambi_reduced_decode2.c b/src/bin_ambi_reduced_decode2.c
new file mode 100644
index 0000000..3b694fd
--- /dev/null
+++ b/src/bin_ambi_reduced_decode2.c
@@ -0,0 +1,1360 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include "iem_bin_ambi.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* -------------------------- bin_ambi_reduced_decode2 ------------------------------ */
+/*
+ ** berechnet ein reduziertes Ambisonic-Decoder-Set in die HRTF-Spektren **
+ ** Inputs: ls + Liste von 3 floats: Index [1 .. 16] + Elevation [-90 .. +90 degree] + Azimut [0 .. 360 degree] **
+ ** Inputs: calc_inv **
+ ** Inputs: load_HRIR + float index1..16 **
+ ** Outputs: List of 2 symbols: left-HRIR-File-name + HRIR-table-name **
+ ** Inputs: calc_reduced **
+ ** "output" ...  writes the HRTF into tables **
+ **  **
+ **  **
+ ** setzt voraus , dass die HRIR-tabele-names von 1016_1_L_HRIR .. 1016_16_L_HRIR heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_re .. 1016_16_HRTF_re heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_im .. 1016_16_HRTF_im heissen und existieren **
+ */
+
+typedef struct _bin_ambi_reduced_decode2
+{
+	t_object			x_obj;
+	t_atom				x_at[2];/*output filename and tablename of HRIR*/
+	int						x_n_dim;/*dimension of ambisonic system*/
+	int						x_n_ambi;/*number of ambi channels*/
+	int						x_n_order;/*order of ambisonic system*/
+	int						x_n_ls;/*number of loudspeakers*/
+	int						x_seq_ok;
+	int						x_fftsize;/*fftsize of blockfilter, should be 2 times of FIR-length of HRIR*/
+	double				*x_inv_work1;/* n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_work2;/* 2*n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_buf2;/* 2*n_ambi buffer for matrix inverse */
+	double				*x_transp;/* n_ls*n_ambi transposed input-buffer of decoder-matrix before inversion */
+	double				*x_ls_encode;/* n_ambi*n_ls straight input-buffer of decoder-matrix before inversion */
+	double				*x_prod;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_ambi_channel_weight;
+	int						*x_delta;
+	int						*x_phi;
+	int						*x_phi_sym;
+	int						*x_sym_flag;
+	BIN_AMBI_COMPLEX	*x_spec;
+	BIN_AMBI_COMPLEX	*x_sin_cos;
+	float					*x_beg_fade_out_hrir;
+	float					*x_beg_hrir;
+	float					**x_beg_hrtf_re;
+	float					**x_beg_hrtf_im;
+	t_symbol			**x_hrir_filename;
+	t_symbol			**x_s_hrir;
+	t_symbol			**x_s_hrtf_re;
+	t_symbol			**x_s_hrtf_im;
+	t_symbol			*x_s_fade_out_hrir;
+	void					*x_out_sign_sum;
+	double				x_sqrt3;
+	double				x_sqrt10_4;
+	double				x_sqrt15_2;
+	double				x_sqrt6_4;
+	double				x_sqrt35_8;
+	double				x_sqrt70_4;
+	double				x_sqrt5_2;
+	double				x_sqrt126_16;
+	double				x_sqrt315_8;
+	double				x_sqrt105_4;
+	double				x_pi_over_180;
+	double				x_sing_range;
+} t_bin_ambi_reduced_decode2;
+
+static t_class *bin_ambi_reduced_decode2_class;
+
+static void bin_ambi_reduced_decode2_init_cos(t_bin_ambi_reduced_decode2 *x)
+{/* initialize a whole sine and cosine wave over a fftsize array */
+	int i, fftsize = x->x_fftsize;
+	float f, g;
+	BIN_AMBI_COMPLEX *sincos = x->x_sin_cos;
+
+	g = 2.0f * 3.1415926538f / (float)fftsize;
+	for(i=0; i<fftsize; i++)
+	{
+		f = g * (float)i;
+		(*sincos).real = cos(f);
+		(*sincos).imag = -sin(f); /*FFT*/
+		sincos++;
+	}
+}
+
+static void bin_ambi_reduced_decode2_quant(t_bin_ambi_reduced_decode2 *x, double *delta_deg2rad, double *phi_deg2rad, int index)
+{
+	double q = 1.0;
+	double d = *delta_deg2rad;
+	double p = *phi_deg2rad;
+	int i;
+
+	if(d < -40.0)
+		d = -40.0;
+	if(d > 90.0)
+		d = 90.0;
+	while(p < 0.0)
+		p += 360.0;
+	while(p >= 360.0)
+		p -= 360.0;
+
+	if(d < -35.0)
+	{
+		*delta_deg2rad = -40.0;
+		q = 360.0 / 56.0;
+	}
+	else if(d < -25.0)
+	{
+		*delta_deg2rad = -30.0;
+		q = 6.0;
+	}
+	else if(d < -15.0)
+	{
+		*delta_deg2rad = -20.0;
+		q = 5.0;
+	}
+	else if(d < -5.0)
+	{
+		*delta_deg2rad = -10.0;
+		q = 5.0;
+	}
+	else if(d < 5.0)
+	{
+		*delta_deg2rad = 0.0;
+		q = 5.0;
+	}
+	else if(d < 15.0)
+	{
+		*delta_deg2rad = 10.0;
+		q = 5.0;
+	}
+	else if(d < 25.0)
+	{
+		*delta_deg2rad = 20.0;
+		q = 5.0;
+	}
+	else if(d < 35.0)
+	{
+		*delta_deg2rad = 30.0;
+		q = 6.0;
+	}
+	else if(d < 45.0)
+	{
+		*delta_deg2rad = 40.0;
+		q = 360.0 / 56.0;
+	}
+	else if(d < 55.0)
+	{
+		*delta_deg2rad = 50.0;
+		q = 8.0;
+	}
+	else if(d < 65.0)
+	{
+		*delta_deg2rad = 60.0;
+		q = 10.0;
+	}
+	else if(d < 75.0)
+	{
+		*delta_deg2rad = 70.0;
+		q = 15.0;
+	}
+	else if(d < 85.0)
+	{
+		*delta_deg2rad = 80.0;
+		q = 30.0;
+	}
+	else
+	{
+		*delta_deg2rad = 90.0;
+		q = 360.0;
+	}
+
+	p /= q;
+	i = (int)(p + 0.499999);
+	p = (double)i * q;
+	i = (int)(p + 0.499999);
+	while(i >= 360)
+		i -= 360;
+	p = (double)i;
+	*phi_deg2rad = p;
+
+	x->x_delta[index] = (int)(*delta_deg2rad);
+	x->x_phi[index] = i;
+
+	*delta_deg2rad *= x->x_pi_over_180;
+	*phi_deg2rad *= x->x_pi_over_180;
+}
+
+static void bin_ambi_reduced_decode2_do_2d(t_bin_ambi_reduced_decode2 *x, int argc, t_atom *argv)
+{
+	double delta=0.0, phi;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+	int n_ls = x->x_n_ls;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode2 ERROR: ls-input needs 1 index and 1 angle: ls_index + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	phi = (double)atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(index >= n_ls)
+		index = n_ls - 1;
+
+	bin_ambi_reduced_decode2_quant(x, &delta, &phi, index);
+
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+	*dw++ = cos(phi);
+	*dw++ = sin(phi);
+
+	if(order >= 2)
+	{
+		*dw++ = cos(2.0*phi);
+		*dw++ = sin(2.0*phi);
+
+		if(order >= 3)
+		{
+			*dw++ = cos(3.0*phi);
+			*dw++ = sin(3.0*phi);
+			if(order >= 4)
+			{
+				*dw++ = cos(4.0*phi);
+				*dw++ = sin(4.0*phi);
+
+				if(order >= 5)
+				{
+					*dw++ = cos(5.0*phi);
+					*dw++ = sin(5.0*phi);
+
+					if(order >= 6)
+					{
+						*dw++ = cos(6.0*phi);
+						*dw++ = sin(6.0*phi);
+
+						if(order >= 7)
+						{
+							*dw++ = cos(7.0*phi);
+							*dw++ = sin(7.0*phi);
+
+							if(order >= 8)
+							{
+								*dw++ = cos(8.0*phi);
+								*dw++ = sin(8.0*phi);
+
+								if(order >= 9)
+								{
+									*dw++ = cos(9.0*phi);
+									*dw++ = sin(9.0*phi);
+
+									if(order >= 10)
+									{
+										*dw++ = cos(10.0*phi);
+										*dw++ = sin(10.0*phi);
+
+										if(order >= 11)
+										{
+											*dw++ = cos(11.0*phi);
+											*dw++ = sin(11.0*phi);
+
+											if(order >= 12)
+											{
+												*dw++ = cos(12.0*phi);
+												*dw++ = sin(12.0*phi);
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode2_do_3d(t_bin_ambi_reduced_decode2 *x, int argc, t_atom *argv)
+{
+	double delta, phi;
+	double cd, sd, cd2, cd3, sd2, csd, cp, sp, cp2, sp2, cp3, sp3, cp4, sp4;
+	double *dw = x->x_transp;
+	int index;
+	int n_ls=x->x_n_ls;
+	int order=x->x_n_order;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode2 ERROR: ls-input needs 1 index and 2 angles: ls index + delta [degree] + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	delta = atom_getfloat(argv++);
+	phi = atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(index >= n_ls)
+		index = n_ls - 1;
+	
+	bin_ambi_reduced_decode2_quant(x, &delta, &phi, index);
+
+	cd = cos(delta);
+	sd = sin(delta);
+	cp = cos(phi);
+	sp = sin(phi);
+	
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+
+	*dw++ = cd * cp;
+	*dw++ = cd * sp;
+	*dw++ = sd;
+
+	if(order >= 2)
+	{
+		cp2 = cos(2.0*phi);
+		sp2 = sin(2.0*phi);
+		cd2 = cd * cd;
+		sd2 = sd * sd;
+		csd = cd * sd;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * cp2;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * sp2;
+		*dw++ = x->x_sqrt3 * csd * cp;
+		*dw++ = x->x_sqrt3 * csd * sp;
+		*dw++ = 0.5 * (3.0 * sd2 - 1.0);
+
+		if(order >= 3)
+		{
+			cp3 = cos(3.0*phi);
+			sp3 = sin(3.0*phi);
+			cd3 = cd2 * cd;
+			*dw++ = x->x_sqrt10_4 * cd3 * cp3;
+			*dw++ = x->x_sqrt10_4 * cd3 * sp3;
+			*dw++ = x->x_sqrt15_2 * cd * csd * cp2;
+			*dw++ = x->x_sqrt15_2 * cd * csd * sp2;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * cp;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * sp;
+			*dw++ = 0.5 * sd * (5.0 * sd2 - 3.0);
+
+			if(order >= 4)
+			{
+				cp4 = cos(4.0*phi);
+				sp4 = sin(4.0*phi);
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * cp4;
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * sp4;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * cp3;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * sp3;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * cp2;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * sp2;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * cp;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * sp;
+				*dw++ = 0.125 * (sd2 * (35.0 * sd2 - 30.0) + 3.0);
+
+				if(order >= 5)
+				{
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * cos(5.0*phi);
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * sin(5.0*phi);
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * cp4;
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * sp4;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * cp3;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * sp3;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * cp2;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * sp2;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * cp;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * sp;
+					*dw = 0.125 * sd * (sd2 * (63.0 * sd2 - 70.0) + 15.0);
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode2_ls(t_bin_ambi_reduced_decode2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode2_do_2d(x, argc, argv);
+	else
+		bin_ambi_reduced_decode2_do_3d(x, argc, argv);
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode2_copy_row2buf(t_bin_ambi_reduced_decode2 *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*db++ = *dw++;
+}
+
+static void bin_ambi_reduced_decode2_copy_buf2row(t_bin_ambi_reduced_decode2 *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw++ = *db++;
+}
+
+static void bin_ambi_reduced_decode2_copy_row2row(t_bin_ambi_reduced_decode2 *x, int src_row, int dst_row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw_src=x->x_inv_work2;
+	double *dw_dst=x->x_inv_work2;
+
+	dw_src += src_row*n_ambi2;
+	dw_dst += dst_row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw_dst++ = *dw_src++;
+}
+
+static void bin_ambi_reduced_decode2_xch_rows(t_bin_ambi_reduced_decode2 *x, int row1, int row2)
+{
+	bin_ambi_reduced_decode2_copy_row2buf(x, row1);
+	bin_ambi_reduced_decode2_copy_row2row(x, row2, row1);
+	bin_ambi_reduced_decode2_copy_buf2row(x, row2);
+}
+
+static void bin_ambi_reduced_decode2_mul_row(t_bin_ambi_reduced_decode2 *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		(*dw) *= mul;
+		dw++;
+	}
+}
+
+static void bin_ambi_reduced_decode2_mul_col(t_bin_ambi_reduced_decode2 *x, int col, double mul)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += col;
+	for(i=0; i<n_ambi; i++)
+	{
+		(*dw) *= mul;
+		dw += n_ambi2;
+	}
+}
+
+static void bin_ambi_reduced_decode2_mul_buf_and_add2row(t_bin_ambi_reduced_decode2 *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		*dw += (*db)*mul;
+		dw++;
+		db++;
+	}
+}
+
+static int bin_ambi_reduced_decode2_eval_which_element_of_col_not_zero(t_bin_ambi_reduced_decode2 *x, int col, int start_row)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j;
+	double *dw=x->x_inv_work2;
+	double singrange=x->x_sing_range;
+	int ret=-1;
+
+	dw += start_row*n_ambi2 + col;
+	j = 0;
+	for(i=start_row; i<n_ambi; i++)
+	{
+		if((*dw > singrange) || (*dw < -singrange))
+		{
+			ret = i;
+			i = n_ambi+1;
+		}
+		dw += n_ambi2;
+	}
+	return(ret);
+}
+
+static void bin_ambi_reduced_decode2_mul1(t_bin_ambi_reduced_decode2 *x)
+{
+	double *vec1, *beg1=x->x_ls_encode;
+	double *vec2, *beg2=x->x_ls_encode;
+	double *inv=x->x_inv_work1;
+	double sum;
+	int n_ls=x->x_n_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j, k;
+
+	for(k=0; k<n_ambi; k++)
+	{
+		beg2=x->x_ls_encode;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ls; i++)
+			{
+				sum += *vec1++ * *vec2++;
+			}
+			beg2 += n_ls;
+			*inv++ = sum;
+		}
+		beg1 += n_ls;
+	}
+}
+
+static void bin_ambi_reduced_decode2_mul2(t_bin_ambi_reduced_decode2 *x)
+{
+	int n_ls=x->x_n_ls;
+	int n_ambi=x->x_n_ambi;
+	int n_ambi2=2*n_ambi;
+	int i, j, k;
+	double *vec1, *beg1=x->x_transp;
+	double *vec2, *beg2=x->x_inv_work2+n_ambi;
+	double *vec3=x->x_prod;
+	double *acw_vec=x->x_ambi_channel_weight;
+	double sum;
+
+	for(k=0; k<n_ls; k++)
+	{
+		beg2=x->x_inv_work2+n_ambi;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ambi; i++)
+			{
+				sum += *vec1++ * *vec2;
+				vec2 += n_ambi2;
+			}
+			beg2++;
+			*vec3++ = sum * acw_vec[j];
+		}
+		beg1 += n_ambi;
+	}
+}
+
+static void bin_ambi_reduced_decode2_transp_back(t_bin_ambi_reduced_decode2 *x)
+{
+	double *vec, *transp=x->x_transp;
+	double *straight=x->x_ls_encode;
+	int n_ls=x->x_n_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j;
+
+	transp = x->x_transp;
+	for(j=0; j<n_ambi; j++)
+	{
+		vec = transp;
+		for(i=0; i<n_ls; i++)
+		{
+			*straight++ = *vec;
+			vec += n_ambi;
+		}
+		transp++;
+	}
+}
+
+static void bin_ambi_reduced_decode2_inverse(t_bin_ambi_reduced_decode2 *x)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j, nz;
+	int r,c;
+	double *src=x->x_inv_work1;
+	double *db=x->x_inv_work2;
+	double rcp, *dv;
+
+	dv = db;
+	for(i=0; i<n_ambi; i++) /* init */
+	{
+		for(j=0; j<n_ambi; j++)
+		{
+			*dv++ = *src++;
+		}
+		for(j=0; j<n_ambi; j++)
+		{
+			if(j == i)
+				*dv++ = 1.0;
+			else
+				*dv++ = 0.0;
+		}
+	}
+
+		/* make 1 in main-diagonale, and 0 below */
+	for(i=0; i<n_ambi; i++)
+	{
+		nz = bin_ambi_reduced_decode2_eval_which_element_of_col_not_zero(x, i, i);
+		if(nz < 0)
+		{
+			post("bin_ambi_reduced_decode2 ERROR: matrix not regular !!!!");
+			x->x_seq_ok = 0;
+			return;
+		}
+		else
+		{
+			if(nz != i)
+				bin_ambi_reduced_decode2_xch_rows(x, i, nz);
+			dv = db + i*n_ambi2 + i;
+			rcp = 1.0 /(*dv);
+			bin_ambi_reduced_decode2_mul_row(x, i, rcp);
+			bin_ambi_reduced_decode2_copy_row2buf(x, i);
+			for(j=i+1; j<n_ambi; j++)
+			{
+				dv += n_ambi2;
+				rcp = -(*dv);
+				bin_ambi_reduced_decode2_mul_buf_and_add2row(x, j, rcp);
+			}
+		}
+	}
+
+			/* make 0 above the main diagonale */
+	for(i=n_ambi-1; i>=0; i--)
+	{
+		dv = db + i*n_ambi2 + i;
+		bin_ambi_reduced_decode2_copy_row2buf(x, i);
+		for(j=i-1; j>=0; j--)
+		{
+			dv -= n_ambi2;
+			rcp = -(*dv);
+			bin_ambi_reduced_decode2_mul_buf_and_add2row(x, j, rcp);
+		}
+	}
+
+	post("matrix_inverse regular");
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode2_calc_pinv(t_bin_ambi_reduced_decode2 *x)
+{
+	t_garray *a;
+	int npoints;
+	t_float *fadevec;
+
+	if((int)(x->x_beg_fade_out_hrir) == 0)
+	{
+		if (!(a = (t_garray *)pd_findbyclass(x->x_s_fade_out_hrir, garray_class)))
+			error("%s: no such array", x->x_s_fade_out_hrir->s_name);
+		else if (!garray_getfloatarray(a, &npoints, &fadevec))
+			error("%s: bad template for bin_ambi_reduced_decode2", x->x_s_fade_out_hrir->s_name);
+		else if (npoints < x->x_fftsize)
+			error("%s: bad array-size: %d", x->x_s_fade_out_hrir->s_name, npoints);
+		else
+			x->x_beg_fade_out_hrir = fadevec;
+	}
+
+	bin_ambi_reduced_decode2_transp_back(x);
+	bin_ambi_reduced_decode2_mul1(x);
+	bin_ambi_reduced_decode2_inverse(x);
+	bin_ambi_reduced_decode2_mul2(x);
+}
+
+/*
+x_prod:
+n_ambi  columns;
+n_ambi    rows;
+*/
+
+static void bin_ambi_reduced_decode2_load_HRIR(t_bin_ambi_reduced_decode2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int p;
+	char buf[60];
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ls)
+		index = x->x_n_ls - 1;
+
+	p = x->x_phi[index];
+
+	if(p)/*change*/
+		p = 360 - p;
+
+	if(p < 10)
+		sprintf(buf, "L%de00%da.wav", x->x_delta[index], p);
+	else if(p < 100)
+		sprintf(buf, "L%de0%da.wav", x->x_delta[index], p);
+	else
+		sprintf(buf, "L%de%da.wav", x->x_delta[index], p);
+	x->x_hrir_filename[index] = gensym(buf);
+
+	SETSYMBOL(x->x_at, x->x_hrir_filename[index]);
+	SETSYMBOL(x->x_at+1, x->x_s_hrir[index]);
+	outlet_list(x->x_obj.ob_outlet, &s_list, 2, x->x_at);
+}
+
+static void bin_ambi_reduced_decode2_check_HRIR_arrays(t_bin_ambi_reduced_decode2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int j, k, n;
+	int fftsize = x->x_fftsize;
+	int fs2=fftsize/2;
+	t_garray *a;
+	int npoints;
+	t_symbol *hrir;
+	t_float *vec_hrir, *vec, *vec_fade_out_hrir;
+	float decr, sum;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ls)
+		index = x->x_n_ls - 1;
+
+	hrir = x->x_s_hrir[index];
+	if (!(a = (t_garray *)pd_findbyclass(hrir, garray_class)))
+		error("%s: no such array", hrir->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir))
+		error("%s: bad template for bin_ambi_reduced_decode2", hrir->s_name);
+	else
+	{
+		if(npoints < fftsize)
+		{
+			post("bin_ambi_reduced_decode2-WARNING: %s-array-size: %d < FFT-size: %d", hrir->s_name, npoints, fftsize);
+		}
+		vec = x->x_beg_hrir;
+		vec += index * fftsize;
+	
+		if((int)(x->x_beg_fade_out_hrir))
+		{
+			vec_fade_out_hrir = x->x_beg_fade_out_hrir;
+			for(j=0; j<fs2; j++)
+				vec[j] = vec_hrir[j]*vec_fade_out_hrir[j];
+		}
+		else
+		{
+			post("no HRIR-fade-out-window found");
+			n = fs2 * 3;
+			n /= 4;
+			for(j=0; j<n; j++)
+				vec[j] = vec_hrir[j];
+			sum = 1.0f;
+			decr = 4.0f / (float)fs2;
+			for(j=n, k=0; j<fs2; j++, k++)
+			{
+				sum -= decr;
+				vec[j] = vec_hrir[j] * sum;
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode2_check_HRTF_arrays(t_bin_ambi_reduced_decode2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	t_garray *a;
+	int npoints;
+	int fftsize = x->x_fftsize;
+	t_float *vec_hrtf_re, *vec_hrtf_im;
+	t_symbol *hrtf_re, *hrtf_im;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ambi)
+		index = x->x_n_ambi - 1;
+
+	hrtf_re = x->x_s_hrtf_re[index];
+	hrtf_im = x->x_s_hrtf_im[index];
+
+	if (!(a = (t_garray *)pd_findbyclass(hrtf_re, garray_class)))
+		error("%s: no such array", hrtf_re->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrtf_re))
+		error("%s: bad template for bin_ambi_reduced_decode2", hrtf_re->s_name);
+	else if (npoints < fftsize)
+		error("%s: bad array-size: %d", hrtf_re->s_name, npoints);
+	else if (!(a = (t_garray *)pd_findbyclass(hrtf_im, garray_class)))
+		error("%s: no such array", hrtf_im->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrtf_im))
+		error("%s: bad template for bin_ambi_reduced_decode2", hrtf_im->s_name);
+	else if (npoints < fftsize)
+		error("%s: bad array-size: %d", hrtf_im->s_name, npoints);
+	else
+	{
+		x->x_beg_hrtf_re[index] = vec_hrtf_re;
+		x->x_beg_hrtf_im[index] = vec_hrtf_im;
+	}
+}
+
+static void bin_ambi_reduced_decode2_calc_reduced(t_bin_ambi_reduced_decode2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int i, j, k, w_index, w_inc, i_inc, v_index, fs1, fs2;
+	int fftsize = x->x_fftsize;
+	BIN_AMBI_COMPLEX old1, old2, w;
+	BIN_AMBI_COMPLEX *sincos = x->x_sin_cos;
+	BIN_AMBI_COMPLEX *val = x->x_spec;/*weighted decoder-matrix with n_ls lines and n_ambi columns*/
+	t_float *vec_hrir, *vec_hrtf_re, *vec_hrtf_im;
+	double *dv, *db=x->x_prod;
+	int n_ambi = x->x_n_ambi;
+	int n_ls = x->x_n_ls;
+	float mul;
+
+	if(x->x_seq_ok)
+	{
+		if(index < 0)
+			index = 0;
+		if(index >= n_ambi)
+			index = n_ambi - 1;
+
+		vec_hrtf_re = x->x_beg_hrtf_re[index];
+		vec_hrtf_im = x->x_beg_hrtf_im[index];
+
+		dv = db + index;
+		mul = (float)(*dv);
+		vec_hrir = x->x_beg_hrir;
+		for(k=0; k<fftsize; k++)/*first step of acumulating the HRIRs*/
+		{
+			val[k].real = mul * vec_hrir[k];
+			val[k].imag = 0.0f;
+		}
+
+		for(j=1; j<n_ls; j++)
+		{
+			dv += n_ambi;
+			mul = (float)(*dv);
+			vec_hrir = x->x_beg_hrir;
+			vec_hrir += j * fftsize;
+			for(k=0; k<fftsize; k++)
+			{
+				val[k].real += mul * vec_hrir[k];
+			}
+		}
+
+		fs1 = fftsize - 1;
+		fs2 = fftsize / 2;
+		i_inc = fs2;
+		w_inc = 1;
+		for(i=1; i<fftsize; i<<=1)
+		{
+			v_index = 0;
+			for(j=0; j<i; j++)
+			{
+				w_index = 0;
+				for(k=0; k<i_inc; k++)
+				{
+					old1 = val[v_index];
+					old2 = val[v_index+i_inc];
+					w = sincos[w_index];
+					val[v_index+i_inc].real = (old1.real-old2.real)*w.real - (old1.imag-old2.imag)*w.imag;
+					val[v_index+i_inc].imag = (old1.imag - old2.imag)*w.real + (old1.real-old2.real)*w.imag;
+					val[v_index].real = old1.real+old2.real;
+					val[v_index].imag = old1.imag+old2.imag;
+					w_index += w_inc;
+					v_index++;
+				}
+				v_index += i_inc;
+			}
+			w_inc <<= 1;
+			i_inc >>= 1;
+		}
+
+		j = 0;
+		for(i=1;i<fs1;i++)
+		{
+			k = fs2;
+			while(k <= j)
+			{
+				j = j - k;
+				k >>= 1;
+			}
+			j = j + k;
+			if(i < j)
+			{
+				old1 = val[j];
+				val[j] = val[i];
+				val[i] = old1;
+			}
+		}
+		for(i = 0; i<fs2; i++)
+		{
+			vec_hrtf_re[i] = val[i].real;
+			vec_hrtf_im[i] = val[i].imag;
+		}
+		vec_hrtf_re[fs2] = val[fs2].real;
+		vec_hrtf_im[fs2] = 0.0f;
+		for(i = fs2+1; i < fftsize; i++)
+		{
+			vec_hrtf_re[i] = 0.0f;
+			vec_hrtf_im[i] = 0.0f;
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode2_decoding(t_bin_ambi_reduced_decode2 *x)
+{
+	int *sym=x->x_phi_sym;
+	int n_ls = x->x_n_ls;
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int *phi=x->x_phi;
+	int *delta=x->x_delta;
+	int *flag=x->x_sym_flag;
+	int i, j, d, p, regular=1;
+	double *dv, *db=x->x_prod;
+	double a, b, q;
+	int sym_max=0;
+	int pos_sym_counter, neg_sym_counter;
+	char plus_minus[100];
+	char abc[100];
+	char onenine[100];
+	char ten[100];
+
+	if(x->x_seq_ok)
+	{
+		for(i=0; i<n_ls; i++)
+			sym[i] = -1;
+
+		plus_minus[0] = 0;
+		if(x->x_n_dim == 2)
+		{
+			strcpy(abc,     "                      WXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXY");
+			strcpy(ten,     "                      000000000000000000011111111111111111111");
+			strcpy(onenine, "                      011223344556677889900112233445566778899");
+			abc[n_ambi+22] = 0;
+			ten[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(ten);
+			post(onenine);
+		}
+		else
+		{
+			strcpy(abc,     "                      AABCABCDEABCDEFGABCDEFGHIABCDEFGHIJKABCDEFGHIJKLM");
+			strcpy(onenine, "                      0111222223333333444444444555555555556666666666666");
+			abc[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(onenine);
+		}
+
+		for(i=0; i<n_ls; i++)/* looking for azimuth symmetries of loudspeakers */
+		{
+			d = delta[i];
+			p = phi[i];
+			for(j=i+1; j<n_ls; j++)
+			{
+				if(d == delta[j])
+				{
+					if((p + phi[j]) == 360)
+					{
+						if((sym[i] < 0) && (sym[j] < 0))
+						{
+							sym[i] = j;
+							sym[j] = i;
+							j = n_ls + 1;
+							sym_max++;
+						}
+					}
+				}
+			}
+		}
+
+		for(p=0; p<n_ambi; p++)/*each col*/
+		{
+			pos_sym_counter = 0;
+			neg_sym_counter = 0;
+			for(i=0; i<n_ls; i++)
+				flag[i] = 1;
+			dv = db + p;
+			for(i=0; i<n_ls; i++)
+			{
+				if((sym[i] >= 0) && flag[i])
+				{
+					j = sym[i];
+					flag[i] = 0;
+					flag[j] = 0;
+					a = dv[i*n_ambi];
+					b = dv[j*n_ambi];
+					if((a < 5.0e-4)&&(a > -5.0e-4)&&(b < 5.0e-4)&&(b > -5.0e-4))
+					{
+						pos_sym_counter++;
+						neg_sym_counter++;
+					}
+					else
+					{
+						q = a / b;
+						if((q < 1.005)&&(q > 0.995))
+							pos_sym_counter++;
+						else if((q > -1.005)&&(q < -0.995))
+							neg_sym_counter++;
+					}
+				}
+			}
+			if(pos_sym_counter == sym_max)
+				strcat(plus_minus, "+");
+			else if(neg_sym_counter == sym_max)
+				strcat(plus_minus, "-");
+			else
+			{
+				strcat(plus_minus, "?");
+				regular = 0;
+			}
+		}
+		post("sum of right channel: %s", plus_minus);
+
+		if(regular)
+		{
+			for(i=0; i<n_ambi; i++)
+			{
+				/*change*/
+				if(plus_minus[i] == '+')
+					SETFLOAT(x->x_at, 1.0f);
+				else if(plus_minus[i] == '-')
+					SETFLOAT(x->x_at, 2.0f);
+				SETFLOAT(x->x_at+1, (float)(i+1));
+				outlet_list(x->x_out_sign_sum, &s_list, 2, x->x_at);
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode2_ambi_weight(t_bin_ambi_reduced_decode2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(argc > x->x_n_order)
+	{
+		int i, k=0, n=x->x_n_order;
+		double d;
+
+		x->x_ambi_channel_weight[k] = (double)atom_getfloat(argv++);
+		k++;
+		if(x->x_n_dim == 2)
+		{
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+			}
+		}
+		else
+		{
+			int j, m;
+
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				m = 2*i + 1;
+				for(j=0; j<m; j++)
+				{
+					x->x_ambi_channel_weight[k] = d;
+					k++;
+				}
+			}
+		}
+	}
+	else
+		post("bin_ambi_reduced_decode2-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
+}
+
+static void bin_ambi_reduced_decode2_sing_range(t_bin_ambi_reduced_decode2 *x, t_floatarg f)
+{
+	if(f < 0.0f)
+		x->x_sing_range = -(double)f;
+	else
+		x->x_sing_range = (double)f;
+}
+
+static void bin_ambi_reduced_decode2_free(t_bin_ambi_reduced_decode2 *x)
+{
+	freebytes(x->x_hrir_filename, x->x_n_ls * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir, x->x_n_ls * sizeof(t_symbol *));
+	freebytes(x->x_s_hrtf_re, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_s_hrtf_im, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_inv_work1, x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_work2, 2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_buf2, 2 * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_transp, x->x_n_ls * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ls_encode, x->x_n_ls * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod, x->x_n_ls * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ambi_channel_weight, x->x_n_ambi * sizeof(double));
+
+	freebytes(x->x_delta, x->x_n_ls * sizeof(int));
+	freebytes(x->x_phi, x->x_n_ls * sizeof(int));
+	freebytes(x->x_phi_sym, x->x_n_ls * sizeof(int));
+	freebytes(x->x_sym_flag, x->x_n_ls * sizeof(int));
+
+	freebytes(x->x_spec, x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+	freebytes(x->x_sin_cos, x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+
+	freebytes(x->x_beg_hrir, x->x_fftsize * x->x_n_ls * sizeof(float));
+	freebytes(x->x_beg_hrtf_re, x->x_n_ambi * sizeof(float *));
+	freebytes(x->x_beg_hrtf_im, x->x_n_ambi * sizeof(float *));
+}
+
+/*
+  1.arg_ int prefix;
+	2.arg: t_symbol *hrir_name;
+	3.arg: t_symbol *hrtf_re_name;
+	4.arg: t_symbol *hrtf_im_name;
+	5.arg: t_symbol *hrir_fade_out_name;
+	6.arg: int ambi_order;
+	7.arg: int dim;
+	8.arg: int number_of_loudspeakers;
+	9.arg: int fftsize;
+	*/
+
+static void *bin_ambi_reduced_decode2_new(t_symbol *s, int argc, t_atom *argv)
+{
+	t_bin_ambi_reduced_decode2 *x = (t_bin_ambi_reduced_decode2 *)pd_new(bin_ambi_reduced_decode2_class);
+	char buf[400];
+	int i, j, fftok, ok=0;
+	int n_order=0, n_dim=0, n_ls=0, n_ambi=0, fftsize=0, prefix=0;
+	t_symbol	*s_hrir=gensym("L_HRIR");
+	t_symbol	*s_hrtf_re=gensym("HRTF_re");
+	t_symbol	*s_hrtf_im=gensym("HRTF_im");
+  t_symbol  *s_fade_out_hrir=gensym("HRIR_win");
+
+	if((argc >= 9) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_SYMBOL(argv,1) &&
+		IS_A_SYMBOL(argv,2) &&
+		IS_A_SYMBOL(argv,3) &&
+		IS_A_SYMBOL(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= (t_symbol *)atom_getsymbolarg(1, argc, argv);
+		s_hrtf_re							= (t_symbol *)atom_getsymbolarg(2, argc, argv);
+		s_hrtf_im							= (t_symbol *)atom_getsymbolarg(3, argc, argv);
+		s_fade_out_hrir	      = (t_symbol *)atom_getsymbolarg(4, argc, argv);
+
+		n_order	= (int)atom_getintarg(5, argc, argv);
+		n_dim		= (int)atom_getintarg(6, argc, argv);
+		n_ls		= (int)atom_getintarg(7, argc, argv);
+		fftsize	= (int)atom_getintarg(8, argc, argv);
+
+		ok = 1;
+	}
+	else if((argc >= 9) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_FLOAT(argv,1) &&
+		IS_A_FLOAT(argv,2) &&
+		IS_A_FLOAT(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= gensym("L_HRIR");
+		s_hrtf_re							= gensym("HRTF_re");
+		s_hrtf_im							= gensym("HRTF_im");
+		s_fade_out_hrir	      = gensym("HRIR_win");
+
+		n_order	= (int)atom_getintarg(5, argc, argv);
+		n_dim		= (int)atom_getintarg(6, argc, argv);
+		n_ls		= (int)atom_getintarg(7, argc, argv);
+		fftsize	= (int)atom_getintarg(8, argc, argv);
+
+		ok = 1;
+	}
+
+	if(ok)
+	{
+		if(n_order < 1)
+			n_order = 1;
+
+		if(n_dim == 3)
+		{
+			if(n_order > 5)
+				n_order = 5;
+			n_ambi = (n_order + 1)*(n_order + 1);
+		}
+		else
+		{
+			if(n_order > 12)
+				n_order = 12;
+			n_dim = 2;
+			n_ambi = 2 * n_order + 1;
+		}
+
+		if(n_ls < 1)
+			n_ls = 1;
+		if(n_ls < n_ambi)
+		{
+			n_ls = n_ambi;
+			post("bin_ambi_reduced_decode2-WARNING: Number of Loudspeakers < Number of Ambisonic-Channels !!!!");
+			post("                                  Number of Loudspeakers set to %d", n_ambi);
+		}
+
+		j = 2;
+		fftok = 0;
+		for(i=0; i<21; i++)
+		{
+			if(j == fftsize)
+			{
+				fftok = 1;
+				i = 22;
+			}
+			j *= 2;
+		}
+
+		if(!fftok)
+		{
+      fftsize = 512;
+			post("bin_ambi_reduced_decode2-WARNING: fftsize not equal to 2 ^ n !!!");
+			post("                                  fftsize set to %d", fftsize);
+		}
+
+		x->x_n_dim			= n_dim;
+		x->x_n_ambi			= n_ambi;
+		x->x_n_ls				= n_ls;
+		x->x_n_order		= n_order;
+		x->x_fftsize		= fftsize;
+
+		x->x_hrir_filename	= (t_symbol **)getbytes(x->x_n_ls * sizeof(t_symbol *));
+		x->x_s_hrir					= (t_symbol **)getbytes(x->x_n_ls * sizeof(t_symbol *));
+		x->x_s_hrtf_re			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+		x->x_s_hrtf_im			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+		
+		for(i=0; i<n_ls; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir->s_name);
+			x->x_s_hrir[i] = gensym(buf);
+		}
+
+		for(i=0; i<n_ambi; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrtf_re->s_name);
+			x->x_s_hrtf_re[i] = gensym(buf);
+			
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrtf_im->s_name);
+			x->x_s_hrtf_im[i] = gensym(buf);
+		}
+
+    sprintf(buf, "%d_%s", prefix, s_fade_out_hrir->s_name);
+    x->x_s_fade_out_hrir = gensym(buf);
+
+		x->x_inv_work1	= (double *)getbytes(x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_work2	= (double *)getbytes(2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_buf2		= (double *)getbytes(2 * x->x_n_ambi * sizeof(double));
+		x->x_transp			= (double *)getbytes(x->x_n_ls * x->x_n_ambi * sizeof(double));
+		x->x_ls_encode	= (double *)getbytes(x->x_n_ls * x->x_n_ambi * sizeof(double));
+		x->x_prod				= (double *)getbytes(x->x_n_ls * x->x_n_ambi * sizeof(double));
+		x->x_ambi_channel_weight = (double *)getbytes(x->x_n_ambi * sizeof(double));
+
+		x->x_delta			= (int *)getbytes(x->x_n_ls * sizeof(int));
+		x->x_phi				= (int *)getbytes(x->x_n_ls * sizeof(int));
+		x->x_phi_sym		= (int *)getbytes(x->x_n_ls * sizeof(int));
+		x->x_sym_flag		= (int *)getbytes(x->x_n_ls * sizeof(int));
+
+		x->x_spec				= (BIN_AMBI_COMPLEX *)getbytes(x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+		x->x_sin_cos		= (BIN_AMBI_COMPLEX *)getbytes(x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+
+		x->x_beg_fade_out_hrir	= (float *)0;
+		x->x_beg_hrir						= (float *)getbytes(x->x_fftsize * x->x_n_ls * sizeof(float));
+		x->x_beg_hrtf_re				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+		x->x_beg_hrtf_im				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+
+		x->x_sqrt3				= sqrt(3.0);
+		x->x_sqrt5_2			= sqrt(5.0) / 2.0;
+		x->x_sqrt6_4			= sqrt(6.0) / 4.0;
+		x->x_sqrt10_4			= sqrt(10.0) / 4.0;
+		x->x_sqrt15_2			= sqrt(15.0) / 2.0;
+		x->x_sqrt35_8			= sqrt(35.0) / 8.0;
+		x->x_sqrt70_4			= sqrt(70.0) / 4.0;
+		x->x_sqrt126_16		= sqrt(126.0) / 16.0;
+		x->x_sqrt315_8		= sqrt(315.0) / 8.0;
+		x->x_sqrt105_4		= sqrt(105.0) / 4.0;
+		x->x_pi_over_180	= 4.0 * atan(1.0) / 180.0;
+		x->x_sing_range = 1.0e-10;
+		x->x_seq_ok = 1;
+		for(i=0; i<n_ambi; i++)
+			x->x_ambi_channel_weight[i] = 1.0;
+
+		bin_ambi_reduced_decode2_init_cos(x);
+
+		outlet_new(&x->x_obj, &s_list);
+		x->x_out_sign_sum = outlet_new(&x->x_obj, &s_list);
+		return(x);
+	}
+	else
+	{
+		post("bin_ambi_reduced_decode2-ERROR: need 1 float + 4 symbols + 4 floats arguments:");
+		post("  prefix(unique-number) + hrir_name + hrtf_re_name + hrtf_im_name + hrir_fade_out_name +");
+		post("   + ambi_order + ambi_dimension + number_of_loudspeakers + fftsize");
+		return(0);
+	}
+}
+
+void bin_ambi_reduced_decode2_setup(void)
+{
+	bin_ambi_reduced_decode2_class = class_new(gensym("bin_ambi_reduced_decode2"), (t_newmethod)bin_ambi_reduced_decode2_new, (t_method)bin_ambi_reduced_decode2_free,
+					 sizeof(t_bin_ambi_reduced_decode2), 0, A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_ls, gensym("ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_calc_pinv, gensym("calc_pinv"), 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_load_HRIR, gensym("load_HRIR"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_check_HRIR_arrays, gensym("check_HRIR_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_check_HRTF_arrays, gensym("check_HRTF_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_calc_reduced, gensym("calc_reduced"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_decoding, gensym("decoding"), 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_ambi_weight, gensym("ambi_weight"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode2_class, (t_method)bin_ambi_reduced_decode2_sing_range, gensym("sing_range"), A_DEFFLOAT, 0);
+	class_sethelpsymbol(bin_ambi_reduced_decode2_class, gensym("iemhelp2/help-bin_ambi_reduced_decode2"));
+}
+/*
+Reihenfolge:
+n_ls x bin_ambi_reduced_decode2_ls
+
+bin_ambi_reduced_decode2_calc_pinv
+
+n_ls x bin_ambi_reduced_decode2_load_HRIR
+
+n_ls x bin_ambi_reduced_decode2_check_HRIR_arrays
+
+n_ambi x bin_ambi_reduced_decode2_check_HRTF_arrays
+
+n_ambi x bin_ambi_reduced_decode2_calc_reduced
+
+bin_ambi_reduced_decode2_decoding
+
+*/
diff --git a/src/bin_ambi_reduced_decode_fft.c b/src/bin_ambi_reduced_decode_fft.c
new file mode 100644
index 0000000..092bbfc
--- /dev/null
+++ b/src/bin_ambi_reduced_decode_fft.c
@@ -0,0 +1,1512 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include "iem_bin_ambi.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* -------------------------- bin_ambi_reduced_decode_fft ------------------------------ */
+/*
+ ** berechnet ein reduziertes Ambisonic-Decoder-Set in die HRTF-Spektren **
+ ** Inputs: ls + Liste von 3 floats: Index [1 .. 16] + Elevation [-90 .. +90 degree] + Azimut [0 .. 360 degree] **
+ ** Inputs: calc_inv **
+ ** Inputs: load_HRIR + float index1..16 **
+ ** Outputs: List of 2 symbols: left-HRIR-File-name + HRIR-table-name **
+ ** Inputs: calc_reduced **
+ ** "output" ...  writes the HRTF into tables **
+ **  **
+ **  **
+ ** setzt voraus , dass die HRIR-tabele-names von 1016_1_L_HRIR .. 1016_16_L_HRIR heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_re .. 1016_16_HRTF_re heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_im .. 1016_16_HRTF_im heissen und existieren **
+ */
+
+typedef struct _bin_ambi_reduced_decode_fft
+{
+	t_object			x_obj;
+	t_atom				x_at[2];/*output filename and tablename of HRIR*/
+	int						x_n_dim;/*dimension of ambisonic system*/
+	int						x_n_ambi;/*number of ambi channels*/
+	int						x_n_order;/*order of ambisonic system*/
+	int						x_n_ind_ls;/*number of independent loudspeakers*/
+	int						x_n_mrg_mir_ls;/*number of mirrored and merged loudspeakers*/
+	int						x_n_ph_ls;/*number of phantom loudspeakers*/
+	int						x_seq_ok;
+	int						x_fftsize;/*fftsize of blockfilter, should be 2 times of FIR-length of HRIR*/
+	double				*x_inv_work1;/* n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_work2;/* 2*n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_buf2;/* 2*n_ambi buffer for matrix inverse */
+	double				*x_transp;/* n_ls*n_ambi transposed input-buffer of decoder-matrix before inversion */
+	double				*x_ls_encode;/* n_ambi*n_ls straight input-buffer of decoder-matrix before inversion */
+	double				*x_prod2;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_prod3;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_ambi_channel_weight;
+	double				x_mirror_weight;
+	int						*x_delta;
+	int						*x_phi;
+	int						*x_phi_sym;
+	int						*x_sym_flag;
+	BIN_AMBI_COMPLEX	*x_spec;
+	BIN_AMBI_COMPLEX	*x_sin_cos;
+	float					*x_beg_fade_out_hrir;
+	float					*x_beg_hrir;
+	float					**x_beg_hrtf_re;
+	float					**x_beg_hrtf_im;
+	t_symbol			**x_hrir_filename;
+	t_symbol			**x_s_hrir;
+	t_symbol			**x_s_hrtf_re;
+	t_symbol			**x_s_hrtf_im;
+	t_symbol			*x_s_fade_out_hrir;
+	void					*x_out_sign_sum;
+	double				x_sqrt3;
+	double				x_sqrt10_4;
+	double				x_sqrt15_2;
+	double				x_sqrt6_4;
+	double				x_sqrt35_8;
+	double				x_sqrt70_4;
+	double				x_sqrt5_2;
+	double				x_sqrt126_16;
+	double				x_sqrt315_8;
+	double				x_sqrt105_4;
+	double				x_pi_over_180;
+	double				x_sing_range;
+} t_bin_ambi_reduced_decode_fft;
+
+static t_class *bin_ambi_reduced_decode_fft_class;
+
+static void bin_ambi_reduced_decode_fft_init_cos(t_bin_ambi_reduced_decode_fft *x)
+{/* initialize a whole sine and cosine wave over a fftsize array */
+	int i, fftsize = x->x_fftsize;
+	float f, g;
+	BIN_AMBI_COMPLEX *sincos = x->x_sin_cos;
+
+	g = 2.0f * 3.1415926538f / (float)fftsize;
+	for(i=0; i<fftsize; i++)
+	{
+		f = g * (float)i;
+		(*sincos).real = cos(f);
+		(*sincos).imag = -sin(f); /*FFT*/
+		sincos++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_quant(t_bin_ambi_reduced_decode_fft *x, double *delta_deg2rad, double *phi_deg2rad, int index)
+{
+	double q = 1.0;
+	double d = *delta_deg2rad;
+	double p = *phi_deg2rad;
+	int i;
+
+	if(d < -40.0)
+		d = -40.0;
+	if(d > 90.0)
+		d = 90.0;
+	while(p < 0.0)
+		p += 360.0;
+	while(p >= 360.0)
+		p -= 360.0;
+
+	if(d < -35.0)
+	{
+		*delta_deg2rad = -40.0;
+		q = 360.0 / 56.0;
+	}
+	else if(d < -25.0)
+	{
+		*delta_deg2rad = -30.0;
+		q = 6.0;
+	}
+	else if(d < -15.0)
+	{
+		*delta_deg2rad = -20.0;
+		q = 5.0;
+	}
+	else if(d < -5.0)
+	{
+		*delta_deg2rad = -10.0;
+		q = 5.0;
+	}
+	else if(d < 5.0)
+	{
+		*delta_deg2rad = 0.0;
+		q = 5.0;
+	}
+	else if(d < 15.0)
+	{
+		*delta_deg2rad = 10.0;
+		q = 5.0;
+	}
+	else if(d < 25.0)
+	{
+		*delta_deg2rad = 20.0;
+		q = 5.0;
+	}
+	else if(d < 35.0)
+	{
+		*delta_deg2rad = 30.0;
+		q = 6.0;
+	}
+	else if(d < 45.0)
+	{
+		*delta_deg2rad = 40.0;
+		q = 360.0 / 56.0;
+	}
+	else if(d < 55.0)
+	{
+		*delta_deg2rad = 50.0;
+		q = 8.0;
+	}
+	else if(d < 65.0)
+	{
+		*delta_deg2rad = 60.0;
+		q = 10.0;
+	}
+	else if(d < 75.0)
+	{
+		*delta_deg2rad = 70.0;
+		q = 15.0;
+	}
+	else if(d < 85.0)
+	{
+		*delta_deg2rad = 80.0;
+		q = 30.0;
+	}
+	else
+	{
+		*delta_deg2rad = 90.0;
+		q = 360.0;
+	}
+
+	p /= q;
+	i = (int)(p + 0.499999);
+	p = (double)i * q;
+	i = (int)(p + 0.499999);
+	while(i >= 360)
+		i -= 360;
+	p = (double)i;
+	*phi_deg2rad = p;
+
+	x->x_delta[index] = (int)(*delta_deg2rad);
+	x->x_phi[index] = i;
+
+	*delta_deg2rad *= x->x_pi_over_180;
+	*phi_deg2rad *= x->x_pi_over_180;
+}
+
+static void bin_ambi_reduced_decode_fft_do_2d(t_bin_ambi_reduced_decode_fft *x, int argc, t_atom *argv, int mode)
+{
+	double delta=0.0, phi;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode_fft ERROR: ls-input needs 1 index and 1 angle: ls_index + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	phi = (double)atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_IND)
+	{
+		if(index >= x->x_n_ind_ls)
+			index = x->x_n_ind_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_MRG)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_MIR)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+			index += x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_ph_ls)
+		{
+			if(index >= x->x_n_ph_ls)
+				index = x->x_n_ph_ls - 1;
+			index += x->x_n_ind_ls;
+			index += 2*x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+
+	bin_ambi_reduced_decode_fft_quant(x, &delta, &phi, index);
+
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+	*dw++ = cos(phi);
+	*dw++ = sin(phi);
+
+	if(order >= 2)
+	{
+		*dw++ = cos(2.0*phi);
+		*dw++ = sin(2.0*phi);
+
+		if(order >= 3)
+		{
+			*dw++ = cos(3.0*phi);
+			*dw++ = sin(3.0*phi);
+			if(order >= 4)
+			{
+				*dw++ = cos(4.0*phi);
+				*dw++ = sin(4.0*phi);
+
+				if(order >= 5)
+				{
+					*dw++ = cos(5.0*phi);
+					*dw++ = sin(5.0*phi);
+
+					if(order >= 6)
+					{
+						*dw++ = cos(6.0*phi);
+						*dw++ = sin(6.0*phi);
+
+						if(order >= 7)
+						{
+							*dw++ = cos(7.0*phi);
+							*dw++ = sin(7.0*phi);
+
+							if(order >= 8)
+							{
+								*dw++ = cos(8.0*phi);
+								*dw++ = sin(8.0*phi);
+
+								if(order >= 9)
+								{
+									*dw++ = cos(9.0*phi);
+									*dw++ = sin(9.0*phi);
+
+									if(order >= 10)
+									{
+										*dw++ = cos(10.0*phi);
+										*dw++ = sin(10.0*phi);
+
+										if(order >= 11)
+										{
+											*dw++ = cos(11.0*phi);
+											*dw++ = sin(11.0*phi);
+
+											if(order >= 12)
+											{
+												*dw++ = cos(12.0*phi);
+												*dw++ = sin(12.0*phi);
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_do_3d(t_bin_ambi_reduced_decode_fft *x, int argc, t_atom *argv, int mode)
+{
+	double delta, phi;
+	double cd, sd, cd2, cd3, sd2, csd, cp, sp, cp2, sp2, cp3, sp3, cp4, sp4;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode_fft ERROR: ls-input needs 1 index and 2 angles: ls index + delta [degree] + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	delta = atom_getfloat(argv++);
+	phi = atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_IND)
+	{
+		if(index >= x->x_n_ind_ls)
+			index = x->x_n_ind_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_MRG)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_MIR)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+			index += x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_ph_ls)
+		{
+			if(index >= x->x_n_ph_ls)
+				index = x->x_n_ph_ls - 1;
+			index += x->x_n_ind_ls;
+			index += 2*x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+	
+	bin_ambi_reduced_decode_fft_quant(x, &delta, &phi, index);
+
+	cd = cos(delta);
+	sd = sin(delta);
+	cp = cos(phi);
+	sp = sin(phi);
+	
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+
+	*dw++ = cd * cp;
+	*dw++ = cd * sp;
+	*dw++ = sd;
+
+	if(order >= 2)
+	{
+		cp2 = cos(2.0*phi);
+		sp2 = sin(2.0*phi);
+		cd2 = cd * cd;
+		sd2 = sd * sd;
+		csd = cd * sd;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * cp2;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * sp2;
+		*dw++ = x->x_sqrt3 * csd * cp;
+		*dw++ = x->x_sqrt3 * csd * sp;
+		*dw++ = 0.5 * (3.0 * sd2 - 1.0);
+
+		if(order >= 3)
+		{
+			cp3 = cos(3.0*phi);
+			sp3 = sin(3.0*phi);
+			cd3 = cd2 * cd;
+			*dw++ = x->x_sqrt10_4 * cd3 * cp3;
+			*dw++ = x->x_sqrt10_4 * cd3 * sp3;
+			*dw++ = x->x_sqrt15_2 * cd * csd * cp2;
+			*dw++ = x->x_sqrt15_2 * cd * csd * sp2;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * cp;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * sp;
+			*dw++ = 0.5 * sd * (5.0 * sd2 - 3.0);
+
+			if(order >= 4)
+			{
+				cp4 = cos(4.0*phi);
+				sp4 = sin(4.0*phi);
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * cp4;
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * sp4;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * cp3;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * sp3;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * cp2;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * sp2;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * cp;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * sp;
+				*dw++ = 0.125 * (sd2 * (35.0 * sd2 - 30.0) + 3.0);
+
+				if(order >= 5)
+				{
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * cos(5.0*phi);
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * sin(5.0*phi);
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * cp4;
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * sp4;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * cp3;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * sp3;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * cp2;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * sp2;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * cp;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * sp;
+					*dw = 0.125 * sd * (sd2 * (63.0 * sd2 - 70.0) + 15.0);
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_ind_ls(t_bin_ambi_reduced_decode_fft *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fft_do_2d(x, argc, argv, BIN_AMBI_LS_IND);
+	else
+		bin_ambi_reduced_decode_fft_do_3d(x, argc, argv, BIN_AMBI_LS_IND);
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fft_mrg_ls(t_bin_ambi_reduced_decode_fft *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fft_do_2d(x, argc, argv, BIN_AMBI_LS_MRG);
+	else
+		bin_ambi_reduced_decode_fft_do_3d(x, argc, argv, BIN_AMBI_LS_MRG);
+}
+
+static void bin_ambi_reduced_decode_fft_mir_ls(t_bin_ambi_reduced_decode_fft *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fft_do_2d(x, argc, argv, BIN_AMBI_LS_MIR);
+	else
+		bin_ambi_reduced_decode_fft_do_3d(x, argc, argv, BIN_AMBI_LS_MIR);
+}
+
+static void bin_ambi_reduced_decode_fft_pht_ls(t_bin_ambi_reduced_decode_fft *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fft_do_2d(x, argc, argv, BIN_AMBI_LS_PHT);
+	else
+		bin_ambi_reduced_decode_fft_do_3d(x, argc, argv, BIN_AMBI_LS_PHT);
+}
+
+static void bin_ambi_reduced_decode_fft_copy_row2buf(t_bin_ambi_reduced_decode_fft *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*db++ = *dw++;
+}
+
+static void bin_ambi_reduced_decode_fft_copy_buf2row(t_bin_ambi_reduced_decode_fft *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw++ = *db++;
+}
+
+static void bin_ambi_reduced_decode_fft_copy_row2row(t_bin_ambi_reduced_decode_fft *x, int src_row, int dst_row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw_src=x->x_inv_work2;
+	double *dw_dst=x->x_inv_work2;
+
+	dw_src += src_row*n_ambi2;
+	dw_dst += dst_row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw_dst++ = *dw_src++;
+}
+
+static void bin_ambi_reduced_decode_fft_xch_rows(t_bin_ambi_reduced_decode_fft *x, int row1, int row2)
+{
+	bin_ambi_reduced_decode_fft_copy_row2buf(x, row1);
+	bin_ambi_reduced_decode_fft_copy_row2row(x, row2, row1);
+	bin_ambi_reduced_decode_fft_copy_buf2row(x, row2);
+}
+
+static void bin_ambi_reduced_decode_fft_mul_row(t_bin_ambi_reduced_decode_fft *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		(*dw) *= mul;
+		dw++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_mul_col(t_bin_ambi_reduced_decode_fft *x, int col, double mul)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += col;
+	for(i=0; i<n_ambi; i++)
+	{
+		(*dw) *= mul;
+		dw += n_ambi2;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_mul_buf_and_add2row(t_bin_ambi_reduced_decode_fft *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		*dw += (*db)*mul;
+		dw++;
+		db++;
+	}
+}
+
+static int bin_ambi_reduced_decode_fft_eval_which_element_of_col_not_zero(t_bin_ambi_reduced_decode_fft *x, int col, int start_row)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j;
+	double *dw=x->x_inv_work2;
+	double singrange=x->x_sing_range;
+	int ret=-1;
+
+	dw += start_row*n_ambi2 + col;
+	j = 0;
+	for(i=start_row; i<n_ambi; i++)
+	{
+		if((*dw > singrange) || (*dw < -singrange))
+		{
+			ret = i;
+			i = n_ambi+1;
+		}
+		dw += n_ambi2;
+	}
+	return(ret);
+}
+
+static void bin_ambi_reduced_decode_fft_mul1(t_bin_ambi_reduced_decode_fft *x)
+{
+	double *vec1, *beg1=x->x_ls_encode;
+	double *vec2, *beg2=x->x_ls_encode;
+	double *inv=x->x_inv_work1;
+	double sum;
+	int n_ls=x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j, k;
+
+	for(k=0; k<n_ambi; k++)
+	{
+		beg2=x->x_ls_encode;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ls; i++)
+			{
+				sum += *vec1++ * *vec2++;
+			}
+			beg2 += n_ls;
+			*inv++ = sum;
+		}
+		beg1 += n_ls;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_mul2(t_bin_ambi_reduced_decode_fft *x)
+{
+	int n_ls=x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls;
+	int n_ambi=x->x_n_ambi;
+	int n_ambi2=2*n_ambi;
+	int i, j, k;
+	double *vec1, *beg1=x->x_transp;
+	double *vec2, *beg2=x->x_inv_work2+n_ambi;
+	double *vec3=x->x_prod2;
+	double *acw_vec=x->x_ambi_channel_weight;
+	double sum;
+
+	for(k=0; k<n_ls; k++)
+	{
+		beg2=x->x_inv_work2+n_ambi;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ambi; i++)
+			{
+				sum += *vec1++ * *vec2;
+				vec2 += n_ambi2;
+			}
+			beg2++;
+			*vec3++ = sum * acw_vec[j];
+		}
+		beg1 += n_ambi;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_mul3(t_bin_ambi_reduced_decode_fft *x)
+{
+	int i, n;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+	double *dv1=x->x_prod2;
+	double mw=x->x_mirror_weight;
+
+	n = x->x_n_ind_ls * x->x_n_ambi;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++;
+	dv2 += n;
+	n = x->x_n_mrg_mir_ls * x->x_n_ambi;
+	dv2 += n;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++ + (*dv2++)*mw;
+}
+
+static void bin_ambi_reduced_decode_fft_transp_back(t_bin_ambi_reduced_decode_fft *x)
+{
+	double *vec, *transp=x->x_transp;
+	double *straight=x->x_ls_encode;
+	int n_ls=x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j;
+
+	transp = x->x_transp;
+	for(j=0; j<n_ambi; j++)
+	{
+		vec = transp;
+		for(i=0; i<n_ls; i++)
+		{
+			*straight++ = *vec;
+			vec += n_ambi;
+		}
+		transp++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_inverse(t_bin_ambi_reduced_decode_fft *x)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j, nz;
+	int r,c;
+	double *src=x->x_inv_work1;
+	double *db=x->x_inv_work2;
+	double rcp, *dv;
+
+	dv = db;
+	for(i=0; i<n_ambi; i++) /* init */
+	{
+		for(j=0; j<n_ambi; j++)
+		{
+			*dv++ = *src++;
+		}
+		for(j=0; j<n_ambi; j++)
+		{
+			if(j == i)
+				*dv++ = 1.0;
+			else
+				*dv++ = 0.0;
+		}
+	}
+
+		/* make 1 in main-diagonale, and 0 below */
+	for(i=0; i<n_ambi; i++)
+	{
+		nz = bin_ambi_reduced_decode_fft_eval_which_element_of_col_not_zero(x, i, i);
+		if(nz < 0)
+		{
+			post("bin_ambi_reduced_decode_fft ERROR: matrix not regular !!!!");
+			x->x_seq_ok = 0;
+			return;
+		}
+		else
+		{
+			if(nz != i)
+				bin_ambi_reduced_decode_fft_xch_rows(x, i, nz);
+			dv = db + i*n_ambi2 + i;
+			rcp = 1.0 /(*dv);
+			bin_ambi_reduced_decode_fft_mul_row(x, i, rcp);
+			bin_ambi_reduced_decode_fft_copy_row2buf(x, i);
+			for(j=i+1; j<n_ambi; j++)
+			{
+				dv += n_ambi2;
+				rcp = -(*dv);
+				bin_ambi_reduced_decode_fft_mul_buf_and_add2row(x, j, rcp);
+			}
+		}
+	}
+
+			/* make 0 above the main diagonale */
+	for(i=n_ambi-1; i>=0; i--)
+	{
+		dv = db + i*n_ambi2 + i;
+		bin_ambi_reduced_decode_fft_copy_row2buf(x, i);
+		for(j=i-1; j>=0; j--)
+		{
+			dv -= n_ambi2;
+			rcp = -(*dv);
+			bin_ambi_reduced_decode_fft_mul_buf_and_add2row(x, j, rcp);
+		}
+	}
+
+	post("matrix_inverse regular");
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fft_calc_pinv(t_bin_ambi_reduced_decode_fft *x)
+{
+	t_garray *a;
+	int npoints;
+	t_float *fadevec;
+
+	if((int)(x->x_beg_fade_out_hrir) == 0)
+	{
+		if (!(a = (t_garray *)pd_findbyclass(x->x_s_fade_out_hrir, garray_class)))
+			error("%s: no such array", x->x_s_fade_out_hrir->s_name);
+		else if (!garray_getfloatarray(a, &npoints, &fadevec))
+			error("%s: bad template for bin_ambi_reduced_decode_fft", x->x_s_fade_out_hrir->s_name);
+		else if (npoints < x->x_fftsize)
+			error("%s: bad array-size: %d", x->x_s_fade_out_hrir->s_name, npoints);
+		else
+			x->x_beg_fade_out_hrir = fadevec;
+	}
+
+	bin_ambi_reduced_decode_fft_transp_back(x);
+	bin_ambi_reduced_decode_fft_mul1(x);
+	bin_ambi_reduced_decode_fft_inverse(x);
+	bin_ambi_reduced_decode_fft_mul2(x);
+	bin_ambi_reduced_decode_fft_mul3(x);
+}
+
+/*
+x_prod:
+n_ambi  columns;
+n_ambi    rows;
+*/
+
+static void bin_ambi_reduced_decode_fft_load_HRIR(t_bin_ambi_reduced_decode_fft *x, float findex)
+{
+	int index=(int)findex - 1;
+	int p;
+	char buf[60];
+
+	if(index < 0)
+		index = 0;
+	if(index >= (x->x_n_ind_ls + x->x_n_mrg_mir_ls))
+		index = x->x_n_ind_ls + x->x_n_mrg_mir_ls - 1;
+
+	p = x->x_phi[index];
+
+	if(p)/*change*/
+		p = 360 - p;
+
+	if(p < 10)
+		sprintf(buf, "L%de00%da.wav", x->x_delta[index], p);
+	else if(p < 100)
+		sprintf(buf, "L%de0%da.wav", x->x_delta[index], p);
+	else
+		sprintf(buf, "L%de%da.wav", x->x_delta[index], p);
+	x->x_hrir_filename[index] = gensym(buf);
+
+	SETSYMBOL(x->x_at, x->x_hrir_filename[index]);
+	SETSYMBOL(x->x_at+1, x->x_s_hrir[index]);
+	outlet_list(x->x_obj.ob_outlet, &s_list, 2, x->x_at);
+}
+
+static void bin_ambi_reduced_decode_fft_check_HRIR_arrays(t_bin_ambi_reduced_decode_fft *x, float findex)
+{
+	int index=(int)findex - 1;
+	int j, k, n;
+	int fftsize = x->x_fftsize;
+	int fs2=fftsize/2;
+	t_garray *a;
+	int npoints;
+	t_symbol *hrir;
+	t_float *vec_hrir, *vec, *vec_fade_out_hrir;
+	float decr, sum;
+
+	if(index < 0)
+		index = 0;
+	if(index >= (x->x_n_ind_ls + x->x_n_mrg_mir_ls))
+		index = x->x_n_ind_ls + x->x_n_mrg_mir_ls - 1;
+
+	hrir = x->x_s_hrir[index];
+	if (!(a = (t_garray *)pd_findbyclass(hrir, garray_class)))
+		error("%s: no such array", hrir->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir))
+		error("%s: bad template for bin_ambi_reduced_decode_fft", hrir->s_name);
+	else
+	{
+		if(npoints < fftsize)
+		{
+			post("bin_ambi_reduced_decode_fft-WARNING: %s-array-size: %d < FFT-size: %d", hrir->s_name, npoints, fftsize);
+		}
+		vec = x->x_beg_hrir;
+		vec += index * fftsize;
+	
+		if((int)(x->x_beg_fade_out_hrir))
+		{
+			vec_fade_out_hrir = x->x_beg_fade_out_hrir;
+			for(j=0; j<fs2; j++)
+				vec[j] = vec_hrir[j]*vec_fade_out_hrir[j];
+		}
+		else
+		{
+			post("no HRIR-fade-out-window found");
+			n = fs2 * 3;
+			n /= 4;
+			for(j=0; j<n; j++)
+				vec[j] = vec_hrir[j];
+			sum = 1.0f;
+			decr = 4.0f / (float)fs2;
+			for(j=n, k=0; j<fs2; j++, k++)
+			{
+				sum -= decr;
+				vec[j] = vec_hrir[j] * sum;
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_check_HRTF_arrays(t_bin_ambi_reduced_decode_fft *x, float findex)
+{
+	int index=(int)findex - 1;
+	t_garray *a;
+	int npoints;
+	int fftsize = x->x_fftsize;
+	t_float *vec_hrtf_re, *vec_hrtf_im;
+	t_symbol *hrtf_re, *hrtf_im;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ambi)
+		index = x->x_n_ambi - 1;
+
+	hrtf_re = x->x_s_hrtf_re[index];
+	hrtf_im = x->x_s_hrtf_im[index];
+
+	if (!(a = (t_garray *)pd_findbyclass(hrtf_re, garray_class)))
+		error("%s: no such array", hrtf_re->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrtf_re))
+		error("%s: bad template for bin_ambi_reduced_decode_fft", hrtf_re->s_name);
+	else if (npoints < fftsize)
+		error("%s: bad array-size: %d", hrtf_re->s_name, npoints);
+	else if (!(a = (t_garray *)pd_findbyclass(hrtf_im, garray_class)))
+		error("%s: no such array", hrtf_im->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrtf_im))
+		error("%s: bad template for bin_ambi_reduced_decode_fft", hrtf_im->s_name);
+	else if (npoints < fftsize)
+		error("%s: bad array-size: %d", hrtf_im->s_name, npoints);
+	else
+	{
+		x->x_beg_hrtf_re[index] = vec_hrtf_re;
+		x->x_beg_hrtf_im[index] = vec_hrtf_im;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_calc_reduced(t_bin_ambi_reduced_decode_fft *x, float findex)
+{
+	int index=(int)findex - 1;
+	int i, j, k, w_index, w_inc, i_inc, v_index, fs1, fs2;
+	int fftsize = x->x_fftsize;
+	BIN_AMBI_COMPLEX old1, old2, w;
+	BIN_AMBI_COMPLEX *sincos = x->x_sin_cos;
+	BIN_AMBI_COMPLEX *val = x->x_spec;/*weighted decoder-matrix with n_ls lines and n_ambi columns*/
+	t_float *vec_hrir, *vec_hrtf_re, *vec_hrtf_im;
+	double *dv, *db=x->x_prod3;
+	int n_ambi = x->x_n_ambi;
+	int n_ls = x->x_n_ind_ls + x->x_n_mrg_mir_ls;
+	float mul;
+
+	if(x->x_seq_ok)
+	{
+		if(index < 0)
+			index = 0;
+		if(index >= n_ambi)
+			index = n_ambi - 1;
+
+		vec_hrtf_re = x->x_beg_hrtf_re[index];
+		vec_hrtf_im = x->x_beg_hrtf_im[index];
+
+		dv = db + index;
+		mul = (float)(*dv);
+		vec_hrir = x->x_beg_hrir;
+		for(k=0; k<fftsize; k++)/*first step of acumulating the HRIRs*/
+		{
+			val[k].real = mul * vec_hrir[k];
+			val[k].imag = 0.0f;
+		}
+
+		for(j=1; j<n_ls; j++)
+		{
+			dv += n_ambi;
+			mul = (float)(*dv);
+			vec_hrir = x->x_beg_hrir;
+			vec_hrir += j * fftsize;
+			for(k=0; k<fftsize; k++)
+			{
+				val[k].real += mul * vec_hrir[k];
+			}
+		}
+
+		fs1 = fftsize - 1;
+		fs2 = fftsize / 2;
+		i_inc = fs2;
+		w_inc = 1;
+		for(i=1; i<fftsize; i<<=1)
+		{
+			v_index = 0;
+			for(j=0; j<i; j++)
+			{
+				w_index = 0;
+				for(k=0; k<i_inc; k++)
+				{
+					old1 = val[v_index];
+					old2 = val[v_index+i_inc];
+					w = sincos[w_index];
+					val[v_index+i_inc].real = (old1.real-old2.real)*w.real - (old1.imag-old2.imag)*w.imag;
+					val[v_index+i_inc].imag = (old1.imag - old2.imag)*w.real + (old1.real-old2.real)*w.imag;
+					val[v_index].real = old1.real+old2.real;
+					val[v_index].imag = old1.imag+old2.imag;
+					w_index += w_inc;
+					v_index++;
+				}
+				v_index += i_inc;
+			}
+			w_inc <<= 1;
+			i_inc >>= 1;
+		}
+
+		j = 0;
+		for(i=1;i<fs1;i++)
+		{
+			k = fs2;
+			while(k <= j)
+			{
+				j = j - k;
+				k >>= 1;
+			}
+			j = j + k;
+			if(i < j)
+			{
+				old1 = val[j];
+				val[j] = val[i];
+				val[i] = old1;
+			}
+		}
+		for(i = 0; i<fs2; i++)
+		{
+			vec_hrtf_re[i] = val[i].real;
+			vec_hrtf_im[i] = val[i].imag;
+		}
+		vec_hrtf_re[fs2] = val[fs2].real;
+		vec_hrtf_im[fs2] = 0.0f;
+		for(i = fs2+1; i < fftsize; i++)
+		{
+			vec_hrtf_re[i] = 0.0f;
+			vec_hrtf_im[i] = 0.0f;
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_calc_sym(t_bin_ambi_reduced_decode_fft *x)
+{
+	int *sym=x->x_phi_sym;
+	int n_ls = x->x_n_ind_ls + x->x_n_mrg_mir_ls;
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int *phi=x->x_phi;
+	int *delta=x->x_delta;
+	int *flag=x->x_sym_flag;
+	int i, j, d, p, regular=1;
+	double *dv, *db=x->x_prod3;
+	double a, b, q;
+	int sym_max=0;
+	int pos_sym_counter, neg_sym_counter;
+	char plus_minus[100];
+	char abc[100];
+	char onenine[100];
+	char ten[100];
+
+	if(x->x_seq_ok)
+	{
+		for(i=0; i<n_ls; i++)
+			sym[i] = -1;
+
+		plus_minus[0] = 0;
+		if(x->x_n_dim == 2)
+		{
+			strcpy(abc,     "                      WXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXY");
+			strcpy(ten,     "                      000000000000000000011111111111111111111");
+			strcpy(onenine, "                      011223344556677889900112233445566778899");
+			abc[n_ambi+22] = 0;
+			ten[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(ten);
+			post(onenine);
+		}
+		else
+		{
+			strcpy(abc,     "                      AABCABCDEABCDEFGABCDEFGHIABCDEFGHIJKABCDEFGHIJKLM");
+			strcpy(onenine, "                      0111222223333333444444444555555555556666666666666");
+			abc[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(onenine);
+		}
+
+		for(i=0; i<n_ls; i++)/* looking for azimuth symmetries of loudspeakers */
+		{
+			d = delta[i];
+			p = phi[i];
+			for(j=i+1; j<n_ls; j++)
+			{
+				if(d == delta[j])
+				{
+					if((p + phi[j]) == 360)
+					{
+						if((sym[i] < 0) && (sym[j] < 0))
+						{
+							sym[i] = j;
+							sym[j] = i;
+							j = n_ls + 1;
+							sym_max++;
+						}
+					}
+				}
+			}
+		}
+
+		for(p=0; p<n_ambi; p++)/*each col*/
+		{
+			pos_sym_counter = 0;
+			neg_sym_counter = 0;
+			for(i=0; i<n_ls; i++)
+				flag[i] = 1;
+			dv = db + p;
+			for(i=0; i<n_ls; i++)
+			{
+				if((sym[i] >= 0) && flag[i])
+				{
+					j = sym[i];
+					flag[i] = 0;
+					flag[j] = 0;
+					a = dv[i*n_ambi];
+					b = dv[j*n_ambi];
+					if((a < 5.0e-4)&&(a > -5.0e-4)&&(b < 5.0e-4)&&(b > -5.0e-4))
+					{
+						pos_sym_counter++;
+						neg_sym_counter++;
+					}
+					else
+					{
+						q = a / b;
+						if((q < 1.005)&&(q > 0.995))
+							pos_sym_counter++;
+						else if((q > -1.005)&&(q < -0.995))
+							neg_sym_counter++;
+					}
+				}
+			}
+			if(pos_sym_counter == sym_max)
+				strcat(plus_minus, "+");
+			else if(neg_sym_counter == sym_max)
+				strcat(plus_minus, "-");
+			else
+			{
+				strcat(plus_minus, "?");
+				regular = 0;
+			}
+		}
+		post("sum of right channel: %s", plus_minus);
+
+		if(regular)
+		{
+			for(i=0; i<n_ambi; i++)
+			{
+				/*change*/
+				if(plus_minus[i] == '+')
+					SETFLOAT(x->x_at, 1.0f);
+				else if(plus_minus[i] == '-')
+					SETFLOAT(x->x_at, 2.0f);
+				SETFLOAT(x->x_at+1, (float)(i+1));
+				outlet_list(x->x_out_sign_sum, &s_list, 2, x->x_at);
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft_ambi_weight(t_bin_ambi_reduced_decode_fft *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(argc > x->x_n_order)
+	{
+		int i, k=0, n=x->x_n_order;
+		double d;
+
+		x->x_ambi_channel_weight[k] = (double)atom_getfloat(argv++);
+		k++;
+		if(x->x_n_dim == 2)
+		{
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+			}
+		}
+		else
+		{
+			int j, m;
+
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				m = 2*i + 1;
+				for(j=0; j<m; j++)
+				{
+					x->x_ambi_channel_weight[k] = d;
+					k++;
+				}
+			}
+		}
+	}
+	else
+		post("bin_ambi_reduced_decode_fft-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
+}
+
+static void bin_ambi_reduced_decode_fft_mirror_weight(t_bin_ambi_reduced_decode_fft *x, t_floatarg f)
+{
+	x->x_mirror_weight = (double)f;
+}
+
+static void bin_ambi_reduced_decode_fft_sing_range(t_bin_ambi_reduced_decode_fft *x, t_floatarg f)
+{
+	if(f < 0.0f)
+		x->x_sing_range = -(double)f;
+	else
+		x->x_sing_range = (double)f;
+}
+
+static void bin_ambi_reduced_decode_fft_free(t_bin_ambi_reduced_decode_fft *x)
+{
+	freebytes(x->x_hrir_filename, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+	freebytes(x->x_s_hrtf_re, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_s_hrtf_im, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_inv_work1, x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_work2, 2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_buf2, 2 * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_transp, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ls_encode, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod2, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod3, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ambi_channel_weight, x->x_n_ambi * sizeof(double));
+
+	freebytes(x->x_delta, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+	freebytes(x->x_phi, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+	freebytes(x->x_phi_sym, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+	freebytes(x->x_sym_flag, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+
+	freebytes(x->x_spec, x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+	freebytes(x->x_sin_cos, x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+
+	freebytes(x->x_beg_hrir, x->x_fftsize * (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(float));
+	freebytes(x->x_beg_hrtf_re, x->x_n_ambi * sizeof(float *));
+	freebytes(x->x_beg_hrtf_im, x->x_n_ambi * sizeof(float *));
+}
+
+/*
+  1.arg_ int prefix;
+	2.arg: t_symbol *hrir_name;
+	3.arg: t_symbol *hrtf_re_name;
+	4.arg: t_symbol *hrtf_im_name;
+	5.arg: t_symbol *hrir_fade_out_name;
+	6.arg: int ambi_order;
+	7.arg: int dim;
+	8.arg: int number_of_loudspeakers;
+	9.arg: int fftsize;
+	*/
+
+static void *bin_ambi_reduced_decode_fft_new(t_symbol *s, int argc, t_atom *argv)
+{
+	t_bin_ambi_reduced_decode_fft *x = (t_bin_ambi_reduced_decode_fft *)pd_new(bin_ambi_reduced_decode_fft_class);
+	char buf[400];
+	int i, j, fftok, ok=0;
+	int n_order=0, n_dim=0, n_ind_ls=0, n_mrg_mir_ls=0, n_ph_ls=0, n_ambi=0, fftsize=0, prefix=0;
+	t_symbol	*s_hrir=gensym("L_HRIR");
+	t_symbol	*s_hrtf_re=gensym("HRTF_re");
+	t_symbol	*s_hrtf_im=gensym("HRTF_im");
+  t_symbol  *s_fade_out_hrir=gensym("HRIR_win");
+
+	if((argc >= 11) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_SYMBOL(argv,1) &&
+		IS_A_SYMBOL(argv,2) &&
+		IS_A_SYMBOL(argv,3) &&
+		IS_A_SYMBOL(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8) &&
+		IS_A_FLOAT(argv,9) &&
+		IS_A_FLOAT(argv,10))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= (t_symbol *)atom_getsymbolarg(1, argc, argv);
+		s_hrtf_re							= (t_symbol *)atom_getsymbolarg(2, argc, argv);
+		s_hrtf_im							= (t_symbol *)atom_getsymbolarg(3, argc, argv);
+		s_fade_out_hrir	      = (t_symbol *)atom_getsymbolarg(4, argc, argv);
+
+		n_order		= (int)atom_getintarg(5, argc, argv);
+		n_dim			= (int)atom_getintarg(6, argc, argv);
+		n_ind_ls	= (int)atom_getintarg(7, argc, argv);
+		n_mrg_mir_ls	= (int)atom_getintarg(8, argc, argv);
+		n_ph_ls		= (int)atom_getintarg(9, argc, argv);
+		fftsize	= (int)atom_getintarg(10, argc, argv);
+
+		ok = 1;
+	}
+	else if((argc >= 11) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_FLOAT(argv,1) &&
+		IS_A_FLOAT(argv,2) &&
+		IS_A_FLOAT(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8) &&
+		IS_A_FLOAT(argv,9) &&
+		IS_A_FLOAT(argv,10))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= gensym("L_HRIR");
+		s_hrtf_re							= gensym("HRTF_re");
+		s_hrtf_im							= gensym("HRTF_im");
+		s_fade_out_hrir	      = gensym("HRIR_win");
+
+		n_order	= (int)atom_getintarg(5, argc, argv);
+		n_dim		= (int)atom_getintarg(6, argc, argv);
+		n_ind_ls	= (int)atom_getintarg(7, argc, argv);
+		n_mrg_mir_ls	= (int)atom_getintarg(8, argc, argv);
+		n_ph_ls		= (int)atom_getintarg(9, argc, argv);
+		fftsize	= (int)atom_getintarg(10, argc, argv);
+
+		ok = 1;
+	}
+
+	if(ok)
+	{
+		if(n_order < 1)
+			n_order = 1;
+
+		if(n_dim == 3)
+		{
+			if(n_order > 5)
+				n_order = 5;
+			n_ambi = (n_order + 1)*(n_order + 1);
+		}
+		else
+		{
+			if(n_order > 12)
+				n_order = 12;
+			n_dim = 2;
+			n_ambi = 2 * n_order + 1;
+		}
+
+		if(n_ind_ls < 1)
+			n_ind_ls = 1;
+		if(n_mrg_mir_ls < 1)
+			n_mrg_mir_ls = 1;
+		if(n_ph_ls < 0)
+			n_ph_ls = 0;
+
+		if((n_ind_ls+2*n_mrg_mir_ls+n_ph_ls) < n_ambi)
+		{
+			post("bin_ambi_reduced_decode_fft-WARNING: Number of all Loudspeakers < Number of Ambisonic-Channels !!!!");
+		}
+
+		j = 2;
+		fftok = 0;
+		for(i=0; i<21; i++)
+		{
+			if(j == fftsize)
+			{
+				fftok = 1;
+				i = 22;
+			}
+			j *= 2;
+		}
+
+		if(!fftok)
+		{
+      fftsize = 512;
+			post("bin_ambi_reduced_decode_fft-WARNING: fftsize not equal to 2 ^ n !!!");
+			post("                                     fftsize set to %d", fftsize);
+		}
+
+		x->x_n_dim			= n_dim;
+		x->x_n_ambi			= n_ambi;
+		x->x_n_ind_ls		= n_ind_ls;
+		x->x_n_mrg_mir_ls		= n_mrg_mir_ls;
+		x->x_n_ph_ls		= n_ph_ls;
+		x->x_n_order		= n_order;
+		x->x_fftsize		= fftsize;
+		
+		x->x_hrir_filename	= (t_symbol **)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+		x->x_s_hrir					= (t_symbol **)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+		x->x_s_hrtf_re			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+		x->x_s_hrtf_im			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+
+		j = x->x_n_ind_ls + x->x_n_mrg_mir_ls;
+		for(i=0; i<j; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir->s_name);
+			x->x_s_hrir[i] = gensym(buf);
+		}
+
+		for(i=0; i<n_ambi; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrtf_re->s_name);
+			x->x_s_hrtf_re[i] = gensym(buf);
+			
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrtf_im->s_name);
+			x->x_s_hrtf_im[i] = gensym(buf);
+		}
+
+    sprintf(buf, "%d_%s", prefix, s_fade_out_hrir->s_name);
+    x->x_s_fade_out_hrir = gensym(buf);
+
+		x->x_inv_work1	= (double *)getbytes(x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_work2	= (double *)getbytes(2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_buf2		= (double *)getbytes(2 * x->x_n_ambi * sizeof(double));
+		x->x_transp			= (double *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+		x->x_ls_encode	= (double *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod2			= (double *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod3			= (double *)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * x->x_n_ambi * sizeof(double));
+		x->x_ambi_channel_weight = (double *)getbytes(x->x_n_ambi * sizeof(double));
+
+		x->x_delta			= (int *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+		x->x_phi				= (int *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+		x->x_phi_sym		= (int *)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+		x->x_sym_flag		= (int *)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+
+		x->x_spec				= (BIN_AMBI_COMPLEX *)getbytes(x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+		x->x_sin_cos		= (BIN_AMBI_COMPLEX *)getbytes(x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+
+		x->x_beg_fade_out_hrir	= (float *)0;
+		x->x_beg_hrir						= (float *)getbytes(x->x_fftsize * (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(float));
+		x->x_beg_hrtf_re				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+		x->x_beg_hrtf_im				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+
+		x->x_sqrt3				= sqrt(3.0);
+		x->x_sqrt5_2			= sqrt(5.0) / 2.0;
+		x->x_sqrt6_4			= sqrt(6.0) / 4.0;
+		x->x_sqrt10_4			= sqrt(10.0) / 4.0;
+		x->x_sqrt15_2			= sqrt(15.0) / 2.0;
+		x->x_sqrt35_8			= sqrt(35.0) / 8.0;
+		x->x_sqrt70_4			= sqrt(70.0) / 4.0;
+		x->x_sqrt126_16		= sqrt(126.0) / 16.0;
+		x->x_sqrt315_8		= sqrt(315.0) / 8.0;
+		x->x_sqrt105_4		= sqrt(105.0) / 4.0;
+		x->x_pi_over_180	= 4.0 * atan(1.0) / 180.0;
+		x->x_sing_range = 1.0e-10;
+		x->x_seq_ok = 1;
+		for(i=0; i<n_ambi; i++)
+			x->x_ambi_channel_weight[i] = 1.0;
+		x->x_mirror_weight = 0.0;
+
+		bin_ambi_reduced_decode_fft_init_cos(x);
+
+		outlet_new(&x->x_obj, &s_list);
+		x->x_out_sign_sum = outlet_new(&x->x_obj, &s_list);
+		return(x);
+	}
+	else
+	{
+		post("bin_ambi_reduced_decode_fft-ERROR: need 1 float + 4 symbols + 6 floats arguments:");
+		post("  prefix(unique-number) + hrir_name + hrtf_re_name + hrtf_im_name + hrir_fade_out_name +");
+		post("   + ambi_order + ambi_dimension + number_of_independent_loudspeakers + ");
+		post("   + number_of_mirrored_and_merged_loudspeakers + number_of_phantom_loudspeakers + fftsize");
+		return(0);
+	}
+}
+
+void bin_ambi_reduced_decode_fft_setup(void)
+{
+	bin_ambi_reduced_decode_fft_class = class_new(gensym("bin_ambi_reduced_decode_fft"), (t_newmethod)bin_ambi_reduced_decode_fft_new, (t_method)bin_ambi_reduced_decode_fft_free,
+					 sizeof(t_bin_ambi_reduced_decode_fft), 0, A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_ind_ls, gensym("ind_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_mrg_ls, gensym("mrg_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_mir_ls, gensym("mir_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_pht_ls, gensym("pht_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_mirror_weight, gensym("mirror_weight"), A_DEFFLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_calc_pinv, gensym("calc_pinv"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_load_HRIR, gensym("load_HRIR"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_check_HRIR_arrays, gensym("check_HRIR_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_check_HRTF_arrays, gensym("check_HRTF_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_calc_reduced, gensym("calc_reduced"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_calc_sym, gensym("calc_sym"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_ambi_weight, gensym("ambi_weight"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft_class, (t_method)bin_ambi_reduced_decode_fft_sing_range, gensym("sing_range"), A_DEFFLOAT, 0);
+	class_sethelpsymbol(bin_ambi_reduced_decode_fft_class, gensym("iemhelp2/help-bin_ambi_reduced_decode_fft"));
+}
+/*
+Reihenfolge:
+n_ls x bin_ambi_reduced_decode_fft_ls
+
+bin_ambi_reduced_decode_fft_calc_pinv
+
+n_ls x bin_ambi_reduced_decode_fft_load_HRIR
+
+n_ls x bin_ambi_reduced_decode_fft_check_HRIR_arrays
+
+n_ambi x bin_ambi_reduced_decode_fft_check_HRTF_arrays
+
+n_ambi x bin_ambi_reduced_decode_fft_calc_reduced
+
+bin_ambi_reduced_decode_fft_calc_sym
+
+*/
diff --git a/src/bin_ambi_reduced_decode_fft2.c b/src/bin_ambi_reduced_decode_fft2.c
new file mode 100644
index 0000000..7e22682
--- /dev/null
+++ b/src/bin_ambi_reduced_decode_fft2.c
@@ -0,0 +1,1388 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include "iem_bin_ambi.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* -------------------------- bin_ambi_reduced_decode_fft2 ------------------------------ */
+/*
+ ** berechnet ein reduziertes Ambisonic-Decoder-Set in die HRTF-Spektren **
+ ** Inputs: ls + Liste von 3 floats: Index [1 .. 16] + Elevation [-90 .. +90 degree] + Azimut [0 .. 360 degree] **
+ ** Inputs: calc_inv **
+ ** Inputs: load_HRIR + float index1..16 **
+ ** Outputs: List of 2 symbols: left-HRIR-File-name + HRIR-table-name **
+ ** Inputs: calc_reduced **
+ ** "output" ...  writes the HRTF into tables **
+ **  **
+ **  **
+ ** setzt voraus , dass die HRIR-tabele-names von 1016_1_L_HRIR .. 1016_16_L_HRIR heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_re .. 1016_16_HRTF_re heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_im .. 1016_16_HRTF_im heissen und existieren **
+ */
+
+typedef struct _bin_ambi_reduced_decode_fft2
+{
+	t_object			x_obj;
+	t_atom				x_at[2];/*output filename and tablename of HRIR*/
+	int						x_n_dim;/*dimension of ambisonic system*/
+	int						x_n_ambi;/*number of ambi channels*/
+	int						x_n_order;/*order of ambisonic system*/
+	int						x_n_real_ls;/*number of real loudspeakers*/
+	int						x_n_pht_ls;/*number of phantom loudspeakers*/
+	int						x_seq_ok;
+	int						x_fftsize;/*fftsize of blockfilter, should be 2 times of FIR-length of HRIR*/
+	double				*x_inv_work1;/* n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_work2;/* 2*n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_buf2;/* 2*n_ambi buffer for matrix inverse */
+	double				*x_transp;/* n_ls*n_ambi transposed input-buffer of decoder-matrix before inversion */
+	double				*x_ls_encode;/* n_ambi*n_ls straight input-buffer of decoder-matrix before inversion */
+	double				*x_prod2;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_prod3;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_ambi_channel_weight;
+	int						*x_delta;
+	int						*x_phi;
+	int						*x_phi_sym;
+	int						*x_sym_flag;
+	BIN_AMBI_COMPLEX	*x_spec;
+	BIN_AMBI_COMPLEX	*x_sin_cos;
+	float					*x_beg_fade_out_hrir;
+	float					*x_beg_hrir;
+	float					**x_beg_hrtf_re;
+	float					**x_beg_hrtf_im;
+	t_symbol			**x_hrir_filename;
+	t_symbol			**x_s_hrir;
+	t_symbol			**x_s_hrtf_re;
+	t_symbol			**x_s_hrtf_im;
+	t_symbol			*x_s_fade_out_hrir;
+	void					*x_out_sign_sum;
+	double				x_sqrt3;
+	double				x_sqrt10_4;
+	double				x_sqrt15_2;
+	double				x_sqrt6_4;
+	double				x_sqrt35_8;
+	double				x_sqrt70_4;
+	double				x_sqrt5_2;
+	double				x_sqrt126_16;
+	double				x_sqrt315_8;
+	double				x_sqrt105_4;
+	double				x_pi_over_180;
+	double				x_sing_range;
+} t_bin_ambi_reduced_decode_fft2;
+
+static t_class *bin_ambi_reduced_decode_fft2_class;
+
+static void bin_ambi_reduced_decode_fft2_init_cos(t_bin_ambi_reduced_decode_fft2 *x)
+{/* initialize a whole sine and cosine wave over a fftsize array */
+	int i, fftsize = x->x_fftsize;
+	float f, g;
+	BIN_AMBI_COMPLEX *sincos = x->x_sin_cos;
+
+	g = 2.0f * 3.1415926538f / (float)fftsize;
+	for(i=0; i<fftsize; i++)
+	{
+		f = g * (float)i;
+		(*sincos).real = cos(f);
+		(*sincos).imag = -sin(f); /*FFT*/
+		sincos++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_convert(t_bin_ambi_reduced_decode_fft2 *x, double *delta_deg2rad, double *phi_deg2rad, int index)
+{
+	double q = 1.0;
+	double d = *delta_deg2rad;
+	double p = *phi_deg2rad;
+	int i;
+
+	if(d < -90.0)
+		d = -90.0;
+	if(d > 90.0)
+		d = 90.0;
+	while(p < 0.0)
+		p += 360.0;
+	while(p >= 360.0)
+		p -= 360.0;
+
+	x->x_delta[index] = (int)(d);
+	x->x_phi[index] = (int)(p);
+
+	*delta_deg2rad = d*x->x_pi_over_180;
+	*phi_deg2rad = p*x->x_pi_over_180;
+}
+
+static void bin_ambi_reduced_decode_fft2_do_2d(t_bin_ambi_reduced_decode_fft2 *x, int argc, t_atom *argv, int mode)
+{
+	double delta=0.0, phi;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode_fft2 ERROR: ls-input needs 1 index and 1 angle: ls_index + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	phi = (double)atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_REAL)
+	{
+		if(index >= x->x_n_real_ls)
+			index = x->x_n_real_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_pht_ls)
+		{
+			if(index >= x->x_n_pht_ls)
+				index = x->x_n_pht_ls - 1;
+			index += x->x_n_real_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+
+	bin_ambi_reduced_decode_fft2_convert(x, &delta, &phi, index);
+
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+	*dw++ = cos(phi);
+	*dw++ = sin(phi);
+
+	if(order >= 2)
+	{
+		*dw++ = cos(2.0*phi);
+		*dw++ = sin(2.0*phi);
+
+		if(order >= 3)
+		{
+			*dw++ = cos(3.0*phi);
+			*dw++ = sin(3.0*phi);
+			if(order >= 4)
+			{
+				*dw++ = cos(4.0*phi);
+				*dw++ = sin(4.0*phi);
+
+				if(order >= 5)
+				{
+					*dw++ = cos(5.0*phi);
+					*dw++ = sin(5.0*phi);
+
+					if(order >= 6)
+					{
+						*dw++ = cos(6.0*phi);
+						*dw++ = sin(6.0*phi);
+
+						if(order >= 7)
+						{
+							*dw++ = cos(7.0*phi);
+							*dw++ = sin(7.0*phi);
+
+							if(order >= 8)
+							{
+								*dw++ = cos(8.0*phi);
+								*dw++ = sin(8.0*phi);
+
+								if(order >= 9)
+								{
+									*dw++ = cos(9.0*phi);
+									*dw++ = sin(9.0*phi);
+
+									if(order >= 10)
+									{
+										*dw++ = cos(10.0*phi);
+										*dw++ = sin(10.0*phi);
+
+										if(order >= 11)
+										{
+											*dw++ = cos(11.0*phi);
+											*dw++ = sin(11.0*phi);
+
+											if(order >= 12)
+											{
+												*dw++ = cos(12.0*phi);
+												*dw++ = sin(12.0*phi);
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_do_3d(t_bin_ambi_reduced_decode_fft2 *x, int argc, t_atom *argv, int mode)
+{
+	double delta, phi;
+	double cd, sd, cd2, cd3, sd2, csd, cp, sp, cp2, sp2, cp3, sp3, cp4, sp4;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode_fft2 ERROR: ls-input needs 1 index and 2 angles: ls index + delta [degree] + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	delta = atom_getfloat(argv++);
+	phi = atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_REAL)
+	{
+		if(index >= x->x_n_real_ls)
+			index = x->x_n_real_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_pht_ls)
+		{
+			if(index >= x->x_n_pht_ls)
+				index = x->x_n_pht_ls - 1;
+			index += x->x_n_real_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+	
+	bin_ambi_reduced_decode_fft2_convert(x, &delta, &phi, index);
+
+	cd = cos(delta);
+	sd = sin(delta);
+	cp = cos(phi);
+	sp = sin(phi);
+	
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+
+	*dw++ = cd * cp;
+	*dw++ = cd * sp;
+	*dw++ = sd;
+
+	if(order >= 2)
+	{
+		cp2 = cos(2.0*phi);
+		sp2 = sin(2.0*phi);
+		cd2 = cd * cd;
+		sd2 = sd * sd;
+		csd = cd * sd;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * cp2;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * sp2;
+		*dw++ = x->x_sqrt3 * csd * cp;
+		*dw++ = x->x_sqrt3 * csd * sp;
+		*dw++ = 0.5 * (3.0 * sd2 - 1.0);
+
+		if(order >= 3)
+		{
+			cp3 = cos(3.0*phi);
+			sp3 = sin(3.0*phi);
+			cd3 = cd2 * cd;
+			*dw++ = x->x_sqrt10_4 * cd3 * cp3;
+			*dw++ = x->x_sqrt10_4 * cd3 * sp3;
+			*dw++ = x->x_sqrt15_2 * cd * csd * cp2;
+			*dw++ = x->x_sqrt15_2 * cd * csd * sp2;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * cp;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * sp;
+			*dw++ = 0.5 * sd * (5.0 * sd2 - 3.0);
+
+			if(order >= 4)
+			{
+				cp4 = cos(4.0*phi);
+				sp4 = sin(4.0*phi);
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * cp4;
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * sp4;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * cp3;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * sp3;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * cp2;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * sp2;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * cp;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * sp;
+				*dw++ = 0.125 * (sd2 * (35.0 * sd2 - 30.0) + 3.0);
+
+				if(order >= 5)
+				{
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * cos(5.0*phi);
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * sin(5.0*phi);
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * cp4;
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * sp4;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * cp3;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * sp3;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * cp2;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * sp2;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * cp;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * sp;
+					*dw = 0.125 * sd * (sd2 * (63.0 * sd2 - 70.0) + 15.0);
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_real_ls(t_bin_ambi_reduced_decode_fft2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fft2_do_2d(x, argc, argv, BIN_AMBI_LS_REAL);
+	else
+		bin_ambi_reduced_decode_fft2_do_3d(x, argc, argv, BIN_AMBI_LS_REAL);
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fft2_pht_ls(t_bin_ambi_reduced_decode_fft2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fft2_do_2d(x, argc, argv, BIN_AMBI_LS_PHT);
+	else
+		bin_ambi_reduced_decode_fft2_do_3d(x, argc, argv, BIN_AMBI_LS_PHT);
+}
+
+static void bin_ambi_reduced_decode_fft2_copy_row2buf(t_bin_ambi_reduced_decode_fft2 *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*db++ = *dw++;
+}
+
+static void bin_ambi_reduced_decode_fft2_copy_buf2row(t_bin_ambi_reduced_decode_fft2 *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw++ = *db++;
+}
+
+static void bin_ambi_reduced_decode_fft2_copy_row2row(t_bin_ambi_reduced_decode_fft2 *x, int src_row, int dst_row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw_src=x->x_inv_work2;
+	double *dw_dst=x->x_inv_work2;
+
+	dw_src += src_row*n_ambi2;
+	dw_dst += dst_row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw_dst++ = *dw_src++;
+}
+
+static void bin_ambi_reduced_decode_fft2_xch_rows(t_bin_ambi_reduced_decode_fft2 *x, int row1, int row2)
+{
+	bin_ambi_reduced_decode_fft2_copy_row2buf(x, row1);
+	bin_ambi_reduced_decode_fft2_copy_row2row(x, row2, row1);
+	bin_ambi_reduced_decode_fft2_copy_buf2row(x, row2);
+}
+
+static void bin_ambi_reduced_decode_fft2_mul_row(t_bin_ambi_reduced_decode_fft2 *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		(*dw) *= mul;
+		dw++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_mul_col(t_bin_ambi_reduced_decode_fft2 *x, int col, double mul)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += col;
+	for(i=0; i<n_ambi; i++)
+	{
+		(*dw) *= mul;
+		dw += n_ambi2;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_mul_buf_and_add2row(t_bin_ambi_reduced_decode_fft2 *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		*dw += (*db)*mul;
+		dw++;
+		db++;
+	}
+}
+
+static int bin_ambi_reduced_decode_fft2_eval_which_element_of_col_not_zero(t_bin_ambi_reduced_decode_fft2 *x, int col, int start_row)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j;
+	double *dw=x->x_inv_work2;
+	double singrange=x->x_sing_range;
+	int ret=-1;
+
+	dw += start_row*n_ambi2 + col;
+	j = 0;
+	for(i=start_row; i<n_ambi; i++)
+	{
+		if((*dw > singrange) || (*dw < -singrange))
+		{
+			ret = i;
+			i = n_ambi+1;
+		}
+		dw += n_ambi2;
+	}
+	return(ret);
+}
+
+static void bin_ambi_reduced_decode_fft2_mul1(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	double *vec1, *beg1=x->x_ls_encode;
+	double *vec2, *beg2=x->x_ls_encode;
+	double *inv=x->x_inv_work1;
+	double sum;
+	int n_ls=x->x_n_real_ls+x->x_n_pht_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j, k;
+
+	for(k=0; k<n_ambi; k++)
+	{
+		beg2=x->x_ls_encode;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ls; i++)
+			{
+				sum += *vec1++ * *vec2++;
+			}
+			beg2 += n_ls;
+			*inv++ = sum;
+		}
+		beg1 += n_ls;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_mul2(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	int n_ls=x->x_n_real_ls+x->x_n_pht_ls;
+	int n_ambi=x->x_n_ambi;
+	int n_ambi2=2*n_ambi;
+	int i, j, k;
+	double *vec1, *beg1=x->x_transp;
+	double *vec2, *beg2=x->x_inv_work2+n_ambi;
+	double *vec3=x->x_prod2;
+	double *acw_vec=x->x_ambi_channel_weight;
+	double sum;
+
+	for(k=0; k<n_ls; k++)
+	{
+		beg2=x->x_inv_work2+n_ambi;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ambi; i++)
+			{
+				sum += *vec1++ * *vec2;
+				vec2 += n_ambi2;
+			}
+			beg2++;
+			*vec3++ = sum * acw_vec[j];
+		}
+		beg1 += n_ambi;
+	}
+}
+
+/* wird ersetzt durch haendische spiegelung und reduzierung
+
+static void bin_ambi_reduced_decode_fft2_mul3(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	int i, n;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+	double *dv1=x->x_prod2;
+	double mw=x->x_mirror_weight;
+
+	n = x->x_n_real_ls * x->x_n_ambi;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++;
+	dv2 += n;
+	n = x->x_n_mrg_mir_ls * x->x_n_ambi;
+	dv2 += n;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++ + (*dv2++)*mw;
+}*/
+
+static void bin_ambi_reduced_decode_fft2_transp_back(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	double *vec, *transp=x->x_transp;
+	double *straight=x->x_ls_encode;
+	int n_ls=x->x_n_real_ls+x->x_n_pht_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j;
+
+	transp = x->x_transp;
+	for(j=0; j<n_ambi; j++)
+	{
+		vec = transp;
+		for(i=0; i<n_ls; i++)
+		{
+			*straight++ = *vec;
+			vec += n_ambi;
+		}
+		transp++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_inverse(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j, nz;
+	int r,c;
+	double *src=x->x_inv_work1;
+	double *db=x->x_inv_work2;
+	double rcp, *dv;
+
+	dv = db;
+	for(i=0; i<n_ambi; i++) /* init */
+	{
+		for(j=0; j<n_ambi; j++)
+		{
+			*dv++ = *src++;
+		}
+		for(j=0; j<n_ambi; j++)
+		{
+			if(j == i)
+				*dv++ = 1.0;
+			else
+				*dv++ = 0.0;
+		}
+	}
+
+		/* make 1 in main-diagonale, and 0 below */
+	for(i=0; i<n_ambi; i++)
+	{
+		nz = bin_ambi_reduced_decode_fft2_eval_which_element_of_col_not_zero(x, i, i);
+		if(nz < 0)
+		{
+			post("bin_ambi_reduced_decode_fft2 ERROR: matrix not regular !!!!");
+			x->x_seq_ok = 0;
+			return;
+		}
+		else
+		{
+			if(nz != i)
+				bin_ambi_reduced_decode_fft2_xch_rows(x, i, nz);
+			dv = db + i*n_ambi2 + i;
+			rcp = 1.0 /(*dv);
+			bin_ambi_reduced_decode_fft2_mul_row(x, i, rcp);
+			bin_ambi_reduced_decode_fft2_copy_row2buf(x, i);
+			for(j=i+1; j<n_ambi; j++)
+			{
+				dv += n_ambi2;
+				rcp = -(*dv);
+				bin_ambi_reduced_decode_fft2_mul_buf_and_add2row(x, j, rcp);
+			}
+		}
+	}
+
+			/* make 0 above the main diagonale */
+	for(i=n_ambi-1; i>=0; i--)
+	{
+		dv = db + i*n_ambi2 + i;
+		bin_ambi_reduced_decode_fft2_copy_row2buf(x, i);
+		for(j=i-1; j>=0; j--)
+		{
+			dv -= n_ambi2;
+			rcp = -(*dv);
+			bin_ambi_reduced_decode_fft2_mul_buf_and_add2row(x, j, rcp);
+		}
+	}
+
+	post("matrix_inverse regular");
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fft2_calc_pinv(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	t_garray *a;
+	int npoints;
+	t_float *fadevec;
+	int i, n;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+
+	if((int)(x->x_beg_fade_out_hrir) == 0)
+	{
+		if (!(a = (t_garray *)pd_findbyclass(x->x_s_fade_out_hrir, garray_class)))
+			error("%s: no such array", x->x_s_fade_out_hrir->s_name);
+		else if (!garray_getfloatarray(a, &npoints, &fadevec))
+			error("%s: bad template for bin_ambi_reduced_decode_fft2", x->x_s_fade_out_hrir->s_name);
+		else if (npoints < x->x_fftsize)
+			error("%s: bad array-size: %d", x->x_s_fade_out_hrir->s_name, npoints);
+		else
+			x->x_beg_fade_out_hrir = fadevec;
+	}
+
+	bin_ambi_reduced_decode_fft2_transp_back(x);
+	bin_ambi_reduced_decode_fft2_mul1(x);
+	bin_ambi_reduced_decode_fft2_inverse(x);
+	bin_ambi_reduced_decode_fft2_mul2(x);
+
+	n = x->x_n_real_ls * x->x_n_ambi;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv2++;
+}
+
+/*
+x_prod:
+n_ambi  columns;
+n_ambi    rows;
+*/
+
+static void bin_ambi_reduced_decode_fft2_ipht_ireal_muladd(t_bin_ambi_reduced_decode_fft2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	int n = x->x_n_ambi;
+	int i, pht_index, real_index;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+	float mw;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode_fft2 ERROR: ipht_ireal_muladd needs 2 index and 1 mirrorweight: pht_ls_index + real_ls_index + mirror_weight_element");
+		return;
+	}
+	pht_index = (int)atom_getint(argv++) - 1;
+	real_index = (int)atom_getint(argv++) - 1;
+	mw = (double)atom_getfloat(argv);
+
+	if(pht_index < 0)
+		pht_index = 0;
+	if(real_index < 0)
+		real_index = 0;
+	if(real_index >= x->x_n_real_ls)
+		real_index = x->x_n_real_ls - 1;
+	if(pht_index >= x->x_n_pht_ls)
+		pht_index = x->x_n_pht_ls - 1;
+
+	dv3 += real_index*x->x_n_ambi;
+	dv2 += (x->x_n_real_ls+pht_index)*x->x_n_ambi;
+	for(i=0; i<n; i++)
+	{
+		*dv3 += (*dv2++)*mw;
+		dv3++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_load_HRIR(t_bin_ambi_reduced_decode_fft2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	int index;
+	t_symbol *hrirname;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode_fft2 ERROR: load_HRIR needs 1 index and 1 HRIR-wav");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	hrirname = atom_getsymbol(argv);
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_real_ls)
+		index = x->x_n_real_ls - 1;
+	x->x_hrir_filename[index] = hrirname;
+
+	SETSYMBOL(x->x_at, x->x_hrir_filename[index]);
+	SETSYMBOL(x->x_at+1, x->x_s_hrir[index]);
+	outlet_list(x->x_obj.ob_outlet, &s_list, 2, x->x_at);
+}
+
+static void bin_ambi_reduced_decode_fft2_check_HRIR_arrays(t_bin_ambi_reduced_decode_fft2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int j, k, n;
+	int fftsize = x->x_fftsize;
+	int fs2=fftsize/2;
+	t_garray *a;
+	int npoints;
+	t_symbol *hrir;
+	t_float *vec_hrir, *vec, *vec_fade_out_hrir;
+	float decr, sum;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_real_ls)
+		index = x->x_n_real_ls - 1;
+
+	hrir = x->x_s_hrir[index];
+	if (!(a = (t_garray *)pd_findbyclass(hrir, garray_class)))
+		error("%s: no such array", hrir->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir))
+		error("%s: bad template for bin_ambi_reduced_decode_fft2", hrir->s_name);
+	else
+	{
+		if(npoints < fftsize)
+		{
+			post("bin_ambi_reduced_decode_fft2-WARNING: %s-array-size: %d < FFT-size: %d", hrir->s_name, npoints, fftsize);
+		}
+		vec = x->x_beg_hrir;
+		vec += index * fftsize;
+	
+		if((int)(x->x_beg_fade_out_hrir))
+		{
+			vec_fade_out_hrir = x->x_beg_fade_out_hrir;
+			for(j=0; j<fs2; j++)
+				vec[j] = vec_hrir[j]*vec_fade_out_hrir[j];
+		}
+		else
+		{
+			post("no HRIR-fade-out-window found");
+			n = fs2 * 3;
+			n /= 4;
+			for(j=0; j<n; j++)
+				vec[j] = vec_hrir[j];
+			sum = 1.0f;
+			decr = 4.0f / (float)fs2;
+			for(j=n, k=0; j<fs2; j++, k++)
+			{
+				sum -= decr;
+				vec[j] = vec_hrir[j] * sum;
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_check_HRTF_arrays(t_bin_ambi_reduced_decode_fft2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	t_garray *a;
+	int npoints;
+	int fftsize = x->x_fftsize;
+	t_float *vec_hrtf_re, *vec_hrtf_im;
+	t_symbol *hrtf_re, *hrtf_im;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ambi)
+		index = x->x_n_ambi - 1;
+
+	hrtf_re = x->x_s_hrtf_re[index];
+	hrtf_im = x->x_s_hrtf_im[index];
+
+	if (!(a = (t_garray *)pd_findbyclass(hrtf_re, garray_class)))
+		error("%s: no such array", hrtf_re->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrtf_re))
+		error("%s: bad template for bin_ambi_reduced_decode_fft2", hrtf_re->s_name);
+	else if (npoints < fftsize)
+		error("%s: bad array-size: %d", hrtf_re->s_name, npoints);
+	else if (!(a = (t_garray *)pd_findbyclass(hrtf_im, garray_class)))
+		error("%s: no such array", hrtf_im->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrtf_im))
+		error("%s: bad template for bin_ambi_reduced_decode_fft2", hrtf_im->s_name);
+	else if (npoints < fftsize)
+		error("%s: bad array-size: %d", hrtf_im->s_name, npoints);
+	else
+	{
+		x->x_beg_hrtf_re[index] = vec_hrtf_re;
+		x->x_beg_hrtf_im[index] = vec_hrtf_im;
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_calc_reduced(t_bin_ambi_reduced_decode_fft2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int i, j, k, w_index, w_inc, i_inc, v_index, fs1, fs2;
+	int fftsize = x->x_fftsize;
+	BIN_AMBI_COMPLEX old1, old2, w;
+	BIN_AMBI_COMPLEX *sincos = x->x_sin_cos;
+	BIN_AMBI_COMPLEX *val = x->x_spec;/*weighted decoder-matrix with n_ls lines and n_ambi columns*/
+	t_float *vec_hrir, *vec_hrtf_re, *vec_hrtf_im;
+	double *dv, *db=x->x_prod3;
+	int n_ambi = x->x_n_ambi;
+	int n_ls = x->x_n_real_ls;
+	float mul;
+
+	if(x->x_seq_ok)
+	{
+		if(index < 0)
+			index = 0;
+		if(index >= n_ambi)
+			index = n_ambi - 1;
+
+		vec_hrtf_re = x->x_beg_hrtf_re[index];
+		vec_hrtf_im = x->x_beg_hrtf_im[index];
+
+		dv = db + index;
+		mul = (float)(*dv);
+		vec_hrir = x->x_beg_hrir;
+		for(k=0; k<fftsize; k++)/*first step of acumulating the HRIRs*/
+		{
+			val[k].real = mul * vec_hrir[k];
+			val[k].imag = 0.0f;
+		}
+
+		for(j=1; j<n_ls; j++)
+		{
+			dv += n_ambi;
+			mul = (float)(*dv);
+			vec_hrir = x->x_beg_hrir;
+			vec_hrir += j * fftsize;
+			for(k=0; k<fftsize; k++)
+			{
+				val[k].real += mul * vec_hrir[k];
+			}
+		}
+
+		fs1 = fftsize - 1;
+		fs2 = fftsize / 2;
+		i_inc = fs2;
+		w_inc = 1;
+		for(i=1; i<fftsize; i<<=1)
+		{
+			v_index = 0;
+			for(j=0; j<i; j++)
+			{
+				w_index = 0;
+				for(k=0; k<i_inc; k++)
+				{
+					old1 = val[v_index];
+					old2 = val[v_index+i_inc];
+					w = sincos[w_index];
+					val[v_index+i_inc].real = (old1.real-old2.real)*w.real - (old1.imag-old2.imag)*w.imag;
+					val[v_index+i_inc].imag = (old1.imag - old2.imag)*w.real + (old1.real-old2.real)*w.imag;
+					val[v_index].real = old1.real+old2.real;
+					val[v_index].imag = old1.imag+old2.imag;
+					w_index += w_inc;
+					v_index++;
+				}
+				v_index += i_inc;
+			}
+			w_inc <<= 1;
+			i_inc >>= 1;
+		}
+
+		j = 0;
+		for(i=1;i<fs1;i++)
+		{
+			k = fs2;
+			while(k <= j)
+			{
+				j = j - k;
+				k >>= 1;
+			}
+			j = j + k;
+			if(i < j)
+			{
+				old1 = val[j];
+				val[j] = val[i];
+				val[i] = old1;
+			}
+		}
+		for(i = 0; i<fs2; i++)
+		{
+			vec_hrtf_re[i] = val[i].real;
+			vec_hrtf_im[i] = val[i].imag;
+		}
+		vec_hrtf_re[fs2] = val[fs2].real;
+		vec_hrtf_im[fs2] = 0.0f;
+		for(i = fs2+1; i < fftsize; i++)
+		{
+			vec_hrtf_re[i] = 0.0f;
+			vec_hrtf_im[i] = 0.0f;
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_calc_sym(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	int *sym=x->x_phi_sym;
+	int n_ls = x->x_n_real_ls;
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int *phi=x->x_phi;
+	int *delta=x->x_delta;
+	int *flag=x->x_sym_flag;
+	int i, j, d, p, regular=1;
+	double *dv, *db=x->x_prod3;
+	double a, b, q;
+	int sym_max=0;
+	int pos_sym_counter, neg_sym_counter;
+	char plus_minus[100];
+	char abc[100];
+	char onenine[100];
+	char ten[100];
+
+	if(x->x_seq_ok)
+	{
+		for(i=0; i<n_ls; i++)
+			sym[i] = -1;
+
+		plus_minus[0] = 0;
+		if(x->x_n_dim == 2)
+		{
+			strcpy(abc,     "                      WXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXY");
+			strcpy(ten,     "                      000000000000000000011111111111111111111");
+			strcpy(onenine, "                      011223344556677889900112233445566778899");
+			abc[n_ambi+22] = 0;
+			ten[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(ten);
+			post(onenine);
+		}
+		else
+		{
+			strcpy(abc,     "                      AABCABCDEABCDEFGABCDEFGHIABCDEFGHIJKABCDEFGHIJKLM");
+			strcpy(onenine, "                      0111222223333333444444444555555555556666666666666");
+			abc[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(onenine);
+		}
+
+		for(i=0; i<n_ls; i++)/* looking for azimuth symmetries of loudspeakers */
+		{
+			d = delta[i];
+			p = phi[i];
+			for(j=i+1; j<n_ls; j++)
+			{
+				if(d == delta[j])
+				{
+					if((p + phi[j]) == 360)
+					{
+						if((sym[i] < 0) && (sym[j] < 0))
+						{
+							sym[i] = j;
+							sym[j] = i;
+							j = n_ls + 1;
+							sym_max++;
+						}
+					}
+				}
+			}
+		}
+
+		for(p=0; p<n_ambi; p++)/*each col*/
+		{
+			pos_sym_counter = 0;
+			neg_sym_counter = 0;
+			for(i=0; i<n_ls; i++)
+				flag[i] = 1;
+			dv = db + p;
+			for(i=0; i<n_ls; i++)
+			{
+				if((sym[i] >= 0) && flag[i])
+				{
+					j = sym[i];
+					flag[i] = 0;
+					flag[j] = 0;
+					a = dv[i*n_ambi];
+					b = dv[j*n_ambi];
+					if((a < 5.0e-4)&&(a > -5.0e-4)&&(b < 5.0e-4)&&(b > -5.0e-4))
+					{
+						pos_sym_counter++;
+						neg_sym_counter++;
+					}
+					else
+					{
+						q = a / b;
+						if((q < 1.005)&&(q > 0.995))
+							pos_sym_counter++;
+						else if((q > -1.005)&&(q < -0.995))
+							neg_sym_counter++;
+					}
+				}
+			}
+			if(pos_sym_counter == sym_max)
+				strcat(plus_minus, "+");
+			else if(neg_sym_counter == sym_max)
+				strcat(plus_minus, "-");
+			else
+			{
+				strcat(plus_minus, "?");
+				regular = 0;
+			}
+		}
+		post("sum of right channel: %s", plus_minus);
+
+		if(regular)
+		{
+			for(i=0; i<n_ambi; i++)
+			{
+				/*change*/
+				if(plus_minus[i] == '+')
+					SETFLOAT(x->x_at, 1.0f);
+				else if(plus_minus[i] == '-')
+					SETFLOAT(x->x_at, 2.0f);
+				SETFLOAT(x->x_at+1, (float)(i+1));
+				outlet_list(x->x_out_sign_sum, &s_list, 2, x->x_at);
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fft2_ambi_weight(t_bin_ambi_reduced_decode_fft2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(argc > x->x_n_order)
+	{
+		int i, k=0, n=x->x_n_order;
+		double d;
+
+		x->x_ambi_channel_weight[k] = (double)atom_getfloat(argv++);
+		k++;
+		if(x->x_n_dim == 2)
+		{
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+			}
+		}
+		else
+		{
+			int j, m;
+
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				m = 2*i + 1;
+				for(j=0; j<m; j++)
+				{
+					x->x_ambi_channel_weight[k] = d;
+					k++;
+				}
+			}
+		}
+	}
+	else
+		post("bin_ambi_reduced_decode_fft2-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
+}
+
+static void bin_ambi_reduced_decode_fft2_sing_range(t_bin_ambi_reduced_decode_fft2 *x, t_floatarg f)
+{
+	if(f < 0.0f)
+		x->x_sing_range = -(double)f;
+	else
+		x->x_sing_range = (double)f;
+}
+
+static void bin_ambi_reduced_decode_fft2_free(t_bin_ambi_reduced_decode_fft2 *x)
+{
+	freebytes(x->x_hrir_filename, x->x_n_real_ls * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir, x->x_n_real_ls * sizeof(t_symbol *));
+	freebytes(x->x_s_hrtf_re, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_s_hrtf_im, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_inv_work1, x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_work2, 2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_buf2, 2 * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_transp, (x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ls_encode, (x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod2, (x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod3, x->x_n_real_ls * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ambi_channel_weight, x->x_n_ambi * sizeof(double));
+
+	freebytes(x->x_delta, (x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+	freebytes(x->x_phi, (x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+	freebytes(x->x_phi_sym, x->x_n_real_ls * sizeof(int));
+	freebytes(x->x_sym_flag, x->x_n_real_ls * sizeof(int));
+
+	freebytes(x->x_spec, x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+	freebytes(x->x_sin_cos, x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+
+	freebytes(x->x_beg_hrir, x->x_fftsize * x->x_n_real_ls * sizeof(float));
+	freebytes(x->x_beg_hrtf_re, x->x_n_ambi * sizeof(float *));
+	freebytes(x->x_beg_hrtf_im, x->x_n_ambi * sizeof(float *));
+}
+
+/*
+  1.arg_ int prefix;
+	2.arg: t_symbol *hrir_name;
+	3.arg: t_symbol *hrtf_re_name;
+	4.arg: t_symbol *hrtf_im_name;
+	5.arg: t_symbol *hrir_fade_out_name;
+	6.arg: int ambi_order;
+	7.arg: int dim;
+	8.arg: int number_of_loudspeakers;
+	9.arg: int fftsize;
+	*/
+
+static void *bin_ambi_reduced_decode_fft2_new(t_symbol *s, int argc, t_atom *argv)
+{
+	t_bin_ambi_reduced_decode_fft2 *x = (t_bin_ambi_reduced_decode_fft2 *)pd_new(bin_ambi_reduced_decode_fft2_class);
+	char buf[400];
+	int i, j, fftok, ok=0;
+	int n_order=0, n_dim=0, n_real_ls=0, n_pht_ls=0, n_ambi=0, fftsize=0, prefix=0;
+	t_symbol	*s_hrir=gensym("L_HRIR");
+	t_symbol	*s_hrtf_re=gensym("HRTF_re");
+	t_symbol	*s_hrtf_im=gensym("HRTF_im");
+  t_symbol  *s_fade_out_hrir=gensym("HRIR_win");
+
+	if((argc >= 10) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_SYMBOL(argv,1) &&
+		IS_A_SYMBOL(argv,2) &&
+		IS_A_SYMBOL(argv,3) &&
+		IS_A_SYMBOL(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8) &&
+		IS_A_FLOAT(argv,9))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= (t_symbol *)atom_getsymbolarg(1, argc, argv);
+		s_hrtf_re							= (t_symbol *)atom_getsymbolarg(2, argc, argv);
+		s_hrtf_im							= (t_symbol *)atom_getsymbolarg(3, argc, argv);
+		s_fade_out_hrir	      = (t_symbol *)atom_getsymbolarg(4, argc, argv);
+
+		n_order		= (int)atom_getintarg(5, argc, argv);
+		n_dim			= (int)atom_getintarg(6, argc, argv);
+		n_real_ls	= (int)atom_getintarg(7, argc, argv);
+		n_pht_ls		= (int)atom_getintarg(8, argc, argv);
+		fftsize	= (int)atom_getintarg(9, argc, argv);
+
+		ok = 1;
+	}
+	else if((argc >= 10) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_FLOAT(argv,1) &&
+		IS_A_FLOAT(argv,2) &&
+		IS_A_FLOAT(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8) &&
+		IS_A_FLOAT(argv,9))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= gensym("L_HRIR");
+		s_hrtf_re							= gensym("HRTF_re");
+		s_hrtf_im							= gensym("HRTF_im");
+		s_fade_out_hrir	      = gensym("HRIR_win");
+
+		n_order	= (int)atom_getintarg(5, argc, argv);
+		n_dim		= (int)atom_getintarg(6, argc, argv);
+		n_real_ls	= (int)atom_getintarg(7, argc, argv);
+		n_pht_ls		= (int)atom_getintarg(8, argc, argv);
+		fftsize	= (int)atom_getintarg(9, argc, argv);
+
+		ok = 1;
+	}
+
+	if(ok)
+	{
+		if(n_order < 1)
+			n_order = 1;
+
+		if(n_dim == 3)
+		{
+			if(n_order > 5)
+				n_order = 5;
+			n_ambi = (n_order + 1)*(n_order + 1);
+		}
+		else
+		{
+			if(n_order > 12)
+				n_order = 12;
+			n_dim = 2;
+			n_ambi = 2 * n_order + 1;
+		}
+
+		if(n_real_ls < 1)
+			n_real_ls = 1;
+		if(n_pht_ls < 0)
+			n_pht_ls = 0;
+
+		if((n_real_ls+n_pht_ls) < n_ambi)
+		{
+			post("bin_ambi_reduced_decode_fft2-WARNING: Number of all Loudspeakers < Number of Ambisonic-Channels !!!!");
+		}
+
+		j = 2;
+		fftok = 0;
+		for(i=0; i<21; i++)
+		{
+			if(j == fftsize)
+			{
+				fftok = 1;
+				i = 22;
+			}
+			j *= 2;
+		}
+
+		if(!fftok)
+		{
+      fftsize = 512;
+			post("bin_ambi_reduced_decode_fft2-WARNING: fftsize not equal to 2 ^ n !!!");
+			post("                                     fftsize set to %d", fftsize);
+		}
+
+		x->x_n_dim			= n_dim;
+		x->x_n_ambi			= n_ambi;
+		x->x_n_real_ls	= n_real_ls;
+		x->x_n_pht_ls		= n_pht_ls;
+		x->x_n_order		= n_order;
+		x->x_fftsize		= fftsize;
+		
+		x->x_hrir_filename	= (t_symbol **)getbytes(x->x_n_real_ls * sizeof(t_symbol *));
+		x->x_s_hrir					= (t_symbol **)getbytes(x->x_n_real_ls * sizeof(t_symbol *));
+		x->x_s_hrtf_re			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+		x->x_s_hrtf_im			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+
+		j = x->x_n_real_ls;
+		for(i=0; i<j; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir->s_name);
+			x->x_s_hrir[i] = gensym(buf);
+		}
+
+		for(i=0; i<n_ambi; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrtf_re->s_name);
+			x->x_s_hrtf_re[i] = gensym(buf);
+			
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrtf_im->s_name);
+			x->x_s_hrtf_im[i] = gensym(buf);
+		}
+
+    sprintf(buf, "%d_%s", prefix, s_fade_out_hrir->s_name);
+    x->x_s_fade_out_hrir = gensym(buf);
+
+		x->x_inv_work1	= (double *)getbytes(x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_work2	= (double *)getbytes(2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_buf2		= (double *)getbytes(2 * x->x_n_ambi * sizeof(double));
+		x->x_transp			= (double *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+		x->x_ls_encode	= (double *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod2			= (double *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod3			= (double *)getbytes(x->x_n_real_ls * x->x_n_ambi * sizeof(double));
+		x->x_ambi_channel_weight = (double *)getbytes(x->x_n_ambi * sizeof(double));
+
+		x->x_delta			= (int *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+		x->x_phi				= (int *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+		x->x_phi_sym		= (int *)getbytes(x->x_n_real_ls * sizeof(int));
+		x->x_sym_flag		= (int *)getbytes(x->x_n_real_ls * sizeof(int));
+
+		x->x_spec				= (BIN_AMBI_COMPLEX *)getbytes(x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+		x->x_sin_cos		= (BIN_AMBI_COMPLEX *)getbytes(x->x_fftsize * sizeof(BIN_AMBI_COMPLEX));
+
+		x->x_beg_fade_out_hrir	= (float *)0;
+		x->x_beg_hrir						= (float *)getbytes(x->x_fftsize * x->x_n_real_ls * sizeof(float));
+		x->x_beg_hrtf_re				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+		x->x_beg_hrtf_im				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+
+		x->x_sqrt3				= sqrt(3.0);
+		x->x_sqrt5_2			= sqrt(5.0) / 2.0;
+		x->x_sqrt6_4			= sqrt(6.0) / 4.0;
+		x->x_sqrt10_4			= sqrt(10.0) / 4.0;
+		x->x_sqrt15_2			= sqrt(15.0) / 2.0;
+		x->x_sqrt35_8			= sqrt(35.0) / 8.0;
+		x->x_sqrt70_4			= sqrt(70.0) / 4.0;
+		x->x_sqrt126_16		= sqrt(126.0) / 16.0;
+		x->x_sqrt315_8		= sqrt(315.0) / 8.0;
+		x->x_sqrt105_4		= sqrt(105.0) / 4.0;
+		x->x_pi_over_180	= 4.0 * atan(1.0) / 180.0;
+		x->x_sing_range = 1.0e-10;
+		x->x_seq_ok = 1;
+		for(i=0; i<n_ambi; i++)
+			x->x_ambi_channel_weight[i] = 1.0;
+
+		bin_ambi_reduced_decode_fft2_init_cos(x);
+
+		outlet_new(&x->x_obj, &s_list);
+		x->x_out_sign_sum = outlet_new(&x->x_obj, &s_list);
+		return(x);
+	}
+	else
+	{
+		post("bin_ambi_reduced_decode_fft2-ERROR: need 1 float + 4 symbols + 5 floats arguments:");
+		post("  prefix(unique-number) + hrir_name + hrtf_re_name + hrtf_im_name + hrir_fade_out_name +");
+		post("   + ambi_order + ambi_dimension + number_of_real_loudspeakers + ");
+		post("   + number_of_phantom_loudspeakers + fftsize");
+		return(0);
+	}
+}
+
+void bin_ambi_reduced_decode_fft2_setup(void)
+{
+	bin_ambi_reduced_decode_fft2_class = class_new(gensym("bin_ambi_reduced_decode_fft2"), (t_newmethod)bin_ambi_reduced_decode_fft2_new, (t_method)bin_ambi_reduced_decode_fft2_free,
+					 sizeof(t_bin_ambi_reduced_decode_fft2), 0, A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_real_ls, gensym("real_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_pht_ls, gensym("pht_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_calc_pinv, gensym("calc_pinv"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_ipht_ireal_muladd, gensym("ipht_ireal_muladd"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_load_HRIR, gensym("load_HRIR"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_check_HRIR_arrays, gensym("check_HRIR_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_check_HRTF_arrays, gensym("check_HRTF_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_calc_reduced, gensym("calc_reduced"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_calc_sym, gensym("calc_sym"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_ambi_weight, gensym("ambi_weight"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fft2_class, (t_method)bin_ambi_reduced_decode_fft2_sing_range, gensym("sing_range"), A_DEFFLOAT, 0);
+	class_sethelpsymbol(bin_ambi_reduced_decode_fft2_class, gensym("iemhelp2/help-bin_ambi_reduced_decode_fft2"));
+}
+/*
+Reihenfolge:
+n_ls x bin_ambi_reduced_decode_fft2_ls
+
+bin_ambi_reduced_decode_fft2_calc_pinv
+
+n_ls x bin_ambi_reduced_decode_fft2_load_HRIR
+
+n_ls x bin_ambi_reduced_decode_fft2_check_HRIR_arrays
+
+n_ambi x bin_ambi_reduced_decode_fft2_check_HRTF_arrays
+
+n_ambi x bin_ambi_reduced_decode_fft2_calc_reduced
+
+bin_ambi_reduced_decode_fft2_calc_sym
+
+*/
diff --git a/src/bin_ambi_reduced_decode_fir.c b/src/bin_ambi_reduced_decode_fir.c
new file mode 100644
index 0000000..e935f04
--- /dev/null
+++ b/src/bin_ambi_reduced_decode_fir.c
@@ -0,0 +1,1385 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include "iem_bin_ambi.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* -------------------------- bin_ambi_reduced_decode_fir ------------------------------ */
+/*
+ ** berechnet ein reduziertes Ambisonic-Decoder-Set in die HRTF-Spektren **
+ ** Inputs: ls + Liste von 3 floats: Index [1 .. 16] + Elevation [-90 .. +90 degree] + Azimut [0 .. 360 degree] **
+ ** Inputs: calc_inv **
+ ** Inputs: load_HRIR + float index1..16 **
+ ** Outputs: List of 2 symbols: left-HRIR-File-name + HRIR-table-name **
+ ** Inputs: calc_reduced **
+ ** "output" ...  writes the HRTF into tables **
+ **  **
+ **  **
+ ** setzt voraus , dass die HRIR-tabele-names von 1016_1_L_HRIR .. 1016_16_L_HRIR heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_re .. 1016_16_HRTF_re heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_im .. 1016_16_HRTF_im heissen und existieren **
+ */
+
+typedef struct _bin_ambi_reduced_decode_fir
+{
+	t_object			x_obj;
+	t_atom				x_at[2];/*output filename and tablename of HRIR*/
+	int						x_n_dim;/*dimension of ambisonic system*/
+	int						x_n_ambi;/*number of ambi channels*/
+	int						x_n_order;/*order of ambisonic system*/
+	int						x_n_ind_ls;/*number of independent loudspeakers*/
+	int						x_n_mrg_mir_ls;/*number of mirrored and merged loudspeakers*/
+	int						x_n_ph_ls;/*number of phantom loudspeakers*/
+	int						x_seq_ok;
+	int						x_firsize;/*size of FIR-filter*/
+	double				*x_inv_work1;/* n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_work2;/* 2*n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_buf2;/* 2*n_ambi buffer for matrix inverse */
+	double				*x_transp;/* n_ls*n_ambi transposed input-buffer of decoder-matrix before inversion */
+	double				*x_ls_encode;/* n_ambi*n_ls straight input-buffer of decoder-matrix before inversion */
+	double				*x_prod2;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_prod3;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_ambi_channel_weight;
+	double				x_mirror_weight;
+	int						*x_delta;
+	int						*x_phi;
+	int						*x_phi_sym;
+	int						*x_sym_flag;
+	float					*x_beg_fade_out_hrir;
+	float					*x_beg_hrir;
+	float					**x_beg_hrir_red;
+	t_symbol			**x_hrir_filename;
+	t_symbol			**x_s_hrir;
+	t_symbol			**x_s_hrir_red;
+	t_symbol			*x_s_fade_out_hrir;
+	void					*x_out_sign_sum;
+	double				x_sqrt3;
+	double				x_sqrt10_4;
+	double				x_sqrt15_2;
+	double				x_sqrt6_4;
+	double				x_sqrt35_8;
+	double				x_sqrt70_4;
+	double				x_sqrt5_2;
+	double				x_sqrt126_16;
+	double				x_sqrt315_8;
+	double				x_sqrt105_4;
+	double				x_pi_over_180;
+	double				x_sing_range;
+} t_bin_ambi_reduced_decode_fir;
+
+static t_class *bin_ambi_reduced_decode_fir_class;
+
+static void bin_ambi_reduced_decode_fir_quant(t_bin_ambi_reduced_decode_fir *x, double *delta_deg2rad, double *phi_deg2rad, int index)
+{
+	double q = 1.0;
+	double d = *delta_deg2rad;
+	double p = *phi_deg2rad;
+	int i;
+
+	if(d < -40.0)
+		d = -40.0;
+	if(d > 90.0)
+		d = 90.0;
+	while(p < 0.0)
+		p += 360.0;
+	while(p >= 360.0)
+		p -= 360.0;
+
+	if(d < -35.0)
+	{
+		*delta_deg2rad = -40.0;
+		q = 360.0 / 56.0;
+	}
+	else if(d < -25.0)
+	{
+		*delta_deg2rad = -30.0;
+		q = 6.0;
+	}
+	else if(d < -15.0)
+	{
+		*delta_deg2rad = -20.0;
+		q = 5.0;
+	}
+	else if(d < -5.0)
+	{
+		*delta_deg2rad = -10.0;
+		q = 5.0;
+	}
+	else if(d < 5.0)
+	{
+		*delta_deg2rad = 0.0;
+		q = 5.0;
+	}
+	else if(d < 15.0)
+	{
+		*delta_deg2rad = 10.0;
+		q = 5.0;
+	}
+	else if(d < 25.0)
+	{
+		*delta_deg2rad = 20.0;
+		q = 5.0;
+	}
+	else if(d < 35.0)
+	{
+		*delta_deg2rad = 30.0;
+		q = 6.0;
+	}
+	else if(d < 45.0)
+	{
+		*delta_deg2rad = 40.0;
+		q = 360.0 / 56.0;
+	}
+	else if(d < 55.0)
+	{
+		*delta_deg2rad = 50.0;
+		q = 8.0;
+	}
+	else if(d < 65.0)
+	{
+		*delta_deg2rad = 60.0;
+		q = 10.0;
+	}
+	else if(d < 75.0)
+	{
+		*delta_deg2rad = 70.0;
+		q = 15.0;
+	}
+	else if(d < 85.0)
+	{
+		*delta_deg2rad = 80.0;
+		q = 30.0;
+	}
+	else
+	{
+		*delta_deg2rad = 90.0;
+		q = 360.0;
+	}
+
+	p /= q;
+	i = (int)(p + 0.499999);
+	p = (double)i * q;
+	i = (int)(p + 0.499999);
+	while(i >= 360)
+		i -= 360;
+	p = (double)i;
+	*phi_deg2rad = p;
+
+	x->x_delta[index] = (int)(*delta_deg2rad);
+	x->x_phi[index] = i;
+
+	*delta_deg2rad *= x->x_pi_over_180;
+	*phi_deg2rad *= x->x_pi_over_180;
+}
+
+static void bin_ambi_reduced_decode_fir_do_2d(t_bin_ambi_reduced_decode_fir *x, int argc, t_atom *argv, int mode)
+{
+	double delta=0.0, phi;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode_fir ERROR: ls-input needs 1 index and 1 angle: ls_index + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	phi = (double)atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_IND)
+	{
+		if(index >= x->x_n_ind_ls)
+			index = x->x_n_ind_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_MRG)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_MIR)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+			index += x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_ph_ls)
+		{
+			if(index >= x->x_n_ph_ls)
+				index = x->x_n_ph_ls - 1;
+			index += x->x_n_ind_ls;
+			index += 2*x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+
+	bin_ambi_reduced_decode_fir_quant(x, &delta, &phi, index);
+
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+	*dw++ = cos(phi);
+	*dw++ = sin(phi);
+
+	if(order >= 2)
+	{
+		*dw++ = cos(2.0*phi);
+		*dw++ = sin(2.0*phi);
+
+		if(order >= 3)
+		{
+			*dw++ = cos(3.0*phi);
+			*dw++ = sin(3.0*phi);
+			if(order >= 4)
+			{
+				*dw++ = cos(4.0*phi);
+				*dw++ = sin(4.0*phi);
+
+				if(order >= 5)
+				{
+					*dw++ = cos(5.0*phi);
+					*dw++ = sin(5.0*phi);
+
+					if(order >= 6)
+					{
+						*dw++ = cos(6.0*phi);
+						*dw++ = sin(6.0*phi);
+
+						if(order >= 7)
+						{
+							*dw++ = cos(7.0*phi);
+							*dw++ = sin(7.0*phi);
+
+							if(order >= 8)
+							{
+								*dw++ = cos(8.0*phi);
+								*dw++ = sin(8.0*phi);
+
+								if(order >= 9)
+								{
+									*dw++ = cos(9.0*phi);
+									*dw++ = sin(9.0*phi);
+
+									if(order >= 10)
+									{
+										*dw++ = cos(10.0*phi);
+										*dw++ = sin(10.0*phi);
+
+										if(order >= 11)
+										{
+											*dw++ = cos(11.0*phi);
+											*dw++ = sin(11.0*phi);
+
+											if(order >= 12)
+											{
+												*dw++ = cos(12.0*phi);
+												*dw++ = sin(12.0*phi);
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_do_3d(t_bin_ambi_reduced_decode_fir *x, int argc, t_atom *argv, int mode)
+{
+	double delta, phi;
+	double cd, sd, cd2, cd3, sd2, csd, cp, sp, cp2, sp2, cp3, sp3, cp4, sp4;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode_fir ERROR: ls-input needs 1 index and 2 angles: ls index + delta [degree] + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	delta = atom_getfloat(argv++);
+	phi = atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_IND)
+	{
+		if(index >= x->x_n_ind_ls)
+			index = x->x_n_ind_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_MRG)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_MIR)
+	{
+		if(x->x_n_mrg_mir_ls)
+		{
+			if(index >= x->x_n_mrg_mir_ls)
+				index = x->x_n_mrg_mir_ls - 1;
+			index += x->x_n_ind_ls;
+			index += x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_ph_ls)
+		{
+			if(index >= x->x_n_ph_ls)
+				index = x->x_n_ph_ls - 1;
+			index += x->x_n_ind_ls;
+			index += 2*x->x_n_mrg_mir_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+	
+	bin_ambi_reduced_decode_fir_quant(x, &delta, &phi, index);
+
+	cd = cos(delta);
+	sd = sin(delta);
+	cp = cos(phi);
+	sp = sin(phi);
+	
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+
+	*dw++ = cd * cp;
+	*dw++ = cd * sp;
+	*dw++ = sd;
+
+	if(order >= 2)
+	{
+		cp2 = cos(2.0*phi);
+		sp2 = sin(2.0*phi);
+		cd2 = cd * cd;
+		sd2 = sd * sd;
+		csd = cd * sd;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * cp2;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * sp2;
+		*dw++ = x->x_sqrt3 * csd * cp;
+		*dw++ = x->x_sqrt3 * csd * sp;
+		*dw++ = 0.5 * (3.0 * sd2 - 1.0);
+
+		if(order >= 3)
+		{
+			cp3 = cos(3.0*phi);
+			sp3 = sin(3.0*phi);
+			cd3 = cd2 * cd;
+			*dw++ = x->x_sqrt10_4 * cd3 * cp3;
+			*dw++ = x->x_sqrt10_4 * cd3 * sp3;
+			*dw++ = x->x_sqrt15_2 * cd * csd * cp2;
+			*dw++ = x->x_sqrt15_2 * cd * csd * sp2;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * cp;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * sp;
+			*dw++ = 0.5 * sd * (5.0 * sd2 - 3.0);
+
+			if(order >= 4)
+			{
+				cp4 = cos(4.0*phi);
+				sp4 = sin(4.0*phi);
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * cp4;
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * sp4;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * cp3;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * sp3;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * cp2;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * sp2;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * cp;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * sp;
+				*dw++ = 0.125 * (sd2 * (35.0 * sd2 - 30.0) + 3.0);
+
+				if(order >= 5)
+				{
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * cos(5.0*phi);
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * sin(5.0*phi);
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * cp4;
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * sp4;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * cp3;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * sp3;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * cp2;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * sp2;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * cp;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * sp;
+					*dw = 0.125 * sd * (sd2 * (63.0 * sd2 - 70.0) + 15.0);
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_ind_ls(t_bin_ambi_reduced_decode_fir *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fir_do_2d(x, argc, argv, BIN_AMBI_LS_IND);
+	else
+		bin_ambi_reduced_decode_fir_do_3d(x, argc, argv, BIN_AMBI_LS_IND);
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fir_mrg_ls(t_bin_ambi_reduced_decode_fir *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fir_do_2d(x, argc, argv, BIN_AMBI_LS_MRG);
+	else
+		bin_ambi_reduced_decode_fir_do_3d(x, argc, argv, BIN_AMBI_LS_MRG);
+}
+
+static void bin_ambi_reduced_decode_fir_mir_ls(t_bin_ambi_reduced_decode_fir *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fir_do_2d(x, argc, argv, BIN_AMBI_LS_MIR);
+	else
+		bin_ambi_reduced_decode_fir_do_3d(x, argc, argv, BIN_AMBI_LS_MIR);
+}
+
+static void bin_ambi_reduced_decode_fir_pht_ls(t_bin_ambi_reduced_decode_fir *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fir_do_2d(x, argc, argv, BIN_AMBI_LS_PHT);
+	else
+		bin_ambi_reduced_decode_fir_do_3d(x, argc, argv, BIN_AMBI_LS_PHT);
+}
+
+static void bin_ambi_reduced_decode_fir_copy_row2buf(t_bin_ambi_reduced_decode_fir *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*db++ = *dw++;
+}
+
+static void bin_ambi_reduced_decode_fir_copy_buf2row(t_bin_ambi_reduced_decode_fir *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw++ = *db++;
+}
+
+static void bin_ambi_reduced_decode_fir_copy_row2row(t_bin_ambi_reduced_decode_fir *x, int src_row, int dst_row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw_src=x->x_inv_work2;
+	double *dw_dst=x->x_inv_work2;
+
+	dw_src += src_row*n_ambi2;
+	dw_dst += dst_row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw_dst++ = *dw_src++;
+}
+
+static void bin_ambi_reduced_decode_fir_xch_rows(t_bin_ambi_reduced_decode_fir *x, int row1, int row2)
+{
+	bin_ambi_reduced_decode_fir_copy_row2buf(x, row1);
+	bin_ambi_reduced_decode_fir_copy_row2row(x, row2, row1);
+	bin_ambi_reduced_decode_fir_copy_buf2row(x, row2);
+}
+
+static void bin_ambi_reduced_decode_fir_mul_row(t_bin_ambi_reduced_decode_fir *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		(*dw) *= mul;
+		dw++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_mul_col(t_bin_ambi_reduced_decode_fir *x, int col, double mul)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += col;
+	for(i=0; i<n_ambi; i++)
+	{
+		(*dw) *= mul;
+		dw += n_ambi2;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_mul_buf_and_add2row(t_bin_ambi_reduced_decode_fir *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		*dw += (*db)*mul;
+		dw++;
+		db++;
+	}
+}
+
+static int bin_ambi_reduced_decode_fir_eval_which_element_of_col_not_zero(t_bin_ambi_reduced_decode_fir *x, int col, int start_row)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j;
+	double *dw=x->x_inv_work2;
+	double singrange=x->x_sing_range;
+	int ret=-1;
+
+	dw += start_row*n_ambi2 + col;
+	j = 0;
+	for(i=start_row; i<n_ambi; i++)
+	{
+		if((*dw > singrange) || (*dw < -singrange))
+		{
+			ret = i;
+			i = n_ambi+1;
+		}
+		dw += n_ambi2;
+	}
+	return(ret);
+}
+
+static void bin_ambi_reduced_decode_fir_mul1(t_bin_ambi_reduced_decode_fir *x)
+{
+	double *vec1, *beg1=x->x_ls_encode;
+	double *vec2, *beg2=x->x_ls_encode;
+	double *inv=x->x_inv_work1;
+	double sum;
+	int n_ls=x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j, k;
+
+	for(k=0; k<n_ambi; k++)
+	{
+		beg2=x->x_ls_encode;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ls; i++)
+			{
+				sum += *vec1++ * *vec2++;
+			}
+			beg2 += n_ls;
+			*inv++ = sum;
+		}
+		beg1 += n_ls;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_mul2(t_bin_ambi_reduced_decode_fir *x)
+{
+	int n_ls=x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls;
+	int n_ambi=x->x_n_ambi;
+	int n_ambi2=2*n_ambi;
+	int i, j, k;
+	double *vec1, *beg1=x->x_transp;
+	double *vec2, *beg2=x->x_inv_work2+n_ambi;
+	double *vec3=x->x_prod2;
+	double *acw_vec=x->x_ambi_channel_weight;
+	double sum;
+
+	for(k=0; k<n_ls; k++)
+	{
+		beg2=x->x_inv_work2+n_ambi;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ambi; i++)
+			{
+				sum += *vec1++ * *vec2;
+				vec2 += n_ambi2;
+			}
+			beg2++;
+			*vec3++ = sum * acw_vec[j];
+		}
+		beg1 += n_ambi;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_mul3(t_bin_ambi_reduced_decode_fir *x)
+{
+	int i, n;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+	double *dv1=x->x_prod2;
+	double mw=x->x_mirror_weight;
+
+	n = x->x_n_ind_ls * x->x_n_ambi;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++;
+	dv2 += n;
+	n = x->x_n_mrg_mir_ls * x->x_n_ambi;
+	dv2 += n;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++ + (*dv2++)*mw;
+}
+
+static void bin_ambi_reduced_decode_fir_transp_back(t_bin_ambi_reduced_decode_fir *x)
+{
+	double *vec, *transp=x->x_transp;
+	double *straight=x->x_ls_encode;
+	int n_ls=x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j;
+
+	transp = x->x_transp;
+	for(j=0; j<n_ambi; j++)
+	{
+		vec = transp;
+		for(i=0; i<n_ls; i++)
+		{
+			*straight++ = *vec;
+			vec += n_ambi;
+		}
+		transp++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_inverse(t_bin_ambi_reduced_decode_fir *x)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j, nz;
+	int r,c;
+	double *src=x->x_inv_work1;
+	double *db=x->x_inv_work2;
+	double rcp, *dv;
+
+	dv = db;
+	for(i=0; i<n_ambi; i++) /* init */
+	{
+		for(j=0; j<n_ambi; j++)
+		{
+			*dv++ = *src++;
+		}
+		for(j=0; j<n_ambi; j++)
+		{
+			if(j == i)
+				*dv++ = 1.0;
+			else
+				*dv++ = 0.0;
+		}
+	}
+
+		/* make 1 in main-diagonale, and 0 below */
+	for(i=0; i<n_ambi; i++)
+	{
+		nz = bin_ambi_reduced_decode_fir_eval_which_element_of_col_not_zero(x, i, i);
+		if(nz < 0)
+		{
+			post("bin_ambi_reduced_decode_fir ERROR: matrix not regular !!!!");
+			x->x_seq_ok = 0;
+			return;
+		}
+		else
+		{
+			if(nz != i)
+				bin_ambi_reduced_decode_fir_xch_rows(x, i, nz);
+			dv = db + i*n_ambi2 + i;
+			rcp = 1.0 /(*dv);
+			bin_ambi_reduced_decode_fir_mul_row(x, i, rcp);
+			bin_ambi_reduced_decode_fir_copy_row2buf(x, i);
+			for(j=i+1; j<n_ambi; j++)
+			{
+				dv += n_ambi2;
+				rcp = -(*dv);
+				bin_ambi_reduced_decode_fir_mul_buf_and_add2row(x, j, rcp);
+			}
+		}
+	}
+
+			/* make 0 above the main diagonale */
+	for(i=n_ambi-1; i>=0; i--)
+	{
+		dv = db + i*n_ambi2 + i;
+		bin_ambi_reduced_decode_fir_copy_row2buf(x, i);
+		for(j=i-1; j>=0; j--)
+		{
+			dv -= n_ambi2;
+			rcp = -(*dv);
+			bin_ambi_reduced_decode_fir_mul_buf_and_add2row(x, j, rcp);
+		}
+	}
+
+	post("matrix_inverse regular");
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fir_calc_pinv(t_bin_ambi_reduced_decode_fir *x)
+{
+	t_garray *a;
+	int npoints;
+	t_float *fadevec;
+
+	if((int)(x->x_beg_fade_out_hrir) == 0)
+	{
+		if (!(a = (t_garray *)pd_findbyclass(x->x_s_fade_out_hrir, garray_class)))
+			error("%s: no such array", x->x_s_fade_out_hrir->s_name);
+		else if (!garray_getfloatarray(a, &npoints, &fadevec))
+			error("%s: bad template for bin_ambi_reduced_decode_fir", x->x_s_fade_out_hrir->s_name);
+		else if (npoints < x->x_firsize)
+			error("%s: bad array-size: %d", x->x_s_fade_out_hrir->s_name, npoints);
+		else
+			x->x_beg_fade_out_hrir = fadevec;
+	}
+
+	bin_ambi_reduced_decode_fir_transp_back(x);
+	bin_ambi_reduced_decode_fir_mul1(x);
+	bin_ambi_reduced_decode_fir_inverse(x);
+	bin_ambi_reduced_decode_fir_mul2(x);
+	bin_ambi_reduced_decode_fir_mul3(x);
+}
+
+/*
+x_prod:
+n_ambi  columns;
+n_ambi    rows;
+*/
+
+static void bin_ambi_reduced_decode_fir_load_HRIR(t_bin_ambi_reduced_decode_fir *x, float findex)
+{
+	int index=(int)findex - 1;
+	int p;
+	char buf[60];
+
+	if(index < 0)
+		index = 0;
+	if(index >= (x->x_n_ind_ls + x->x_n_mrg_mir_ls))
+		index = x->x_n_ind_ls + x->x_n_mrg_mir_ls - 1;
+
+	p = x->x_phi[index];
+
+	if(p)/*change*/
+		p = 360 - p;
+
+	if(p < 10)
+		sprintf(buf, "L%de00%da.wav", x->x_delta[index], p);
+	else if(p < 100)
+		sprintf(buf, "L%de0%da.wav", x->x_delta[index], p);
+	else
+		sprintf(buf, "L%de%da.wav", x->x_delta[index], p);
+	x->x_hrir_filename[index] = gensym(buf);
+
+	SETSYMBOL(x->x_at, x->x_hrir_filename[index]);
+	SETSYMBOL(x->x_at+1, x->x_s_hrir[index]);
+	outlet_list(x->x_obj.ob_outlet, &s_list, 2, x->x_at);
+}
+
+static void bin_ambi_reduced_decode_fir_check_HRIR_LS_arrays(t_bin_ambi_reduced_decode_fir *x, float findex)
+{
+	int index=(int)findex - 1;
+	int j, k, n;
+	int firsize = x->x_firsize;
+	int fs2=firsize/2;
+	t_garray *a;
+	int npoints;
+	t_symbol *hrir;
+	t_float *vec_hrir, *vec, *vec_fade_out_hrir;
+	float decr, sum;
+
+	if(index < 0)
+		index = 0;
+	if(index >= (x->x_n_ind_ls + x->x_n_mrg_mir_ls))
+		index = x->x_n_ind_ls + x->x_n_mrg_mir_ls - 1;
+
+	hrir = x->x_s_hrir[index];
+	if (!(a = (t_garray *)pd_findbyclass(hrir, garray_class)))
+		error("%s: no such array", hrir->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir))
+		error("%s: bad template for bin_ambi_reduced_decode_fir", hrir->s_name);
+	else
+	{
+		if(npoints < firsize)
+		{
+			post("bin_ambi_reduced_decode_fir-WARNING: %s-array-size: %d < FFT-size: %d", hrir->s_name, npoints, firsize);
+		}
+		vec = x->x_beg_hrir;
+		vec += index * firsize;
+	
+		if((int)(x->x_beg_fade_out_hrir))
+		{
+			vec_fade_out_hrir = x->x_beg_fade_out_hrir;
+			for(j=0; j<fs2; j++)
+				vec[j] = vec_hrir[j]*vec_fade_out_hrir[j];
+		}
+		else
+		{
+			post("no HRIR-fade-out-window found");
+			n = fs2 * 3;
+			n /= 4;
+			for(j=0; j<n; j++)
+				vec[j] = vec_hrir[j];
+			sum = 1.0f;
+			decr = 4.0f / (float)fs2;
+			for(j=n, k=0; j<fs2; j++, k++)
+			{
+				sum -= decr;
+				vec[j] = vec_hrir[j] * sum;
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_check_HRIR_RED_arrays(t_bin_ambi_reduced_decode_fir *x, float findex)
+{
+	int index=(int)findex - 1;
+	t_garray *a;
+	int npoints;
+	int firsize = x->x_firsize;
+	t_float *vec_hrir_red;
+	t_symbol *hrir_red;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ambi)
+		index = x->x_n_ambi - 1;
+
+	hrir_red = x->x_s_hrir_red[index];
+
+	if (!(a = (t_garray *)pd_findbyclass(hrir_red, garray_class)))
+		error("%s: no such array", hrir_red->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir_red))
+		error("%s: bad template for bin_ambi_reduced_decode_fir", hrir_red->s_name);
+	else if (npoints < firsize)
+		error("%s: bad array-size: %d", hrir_red->s_name, npoints);
+	else
+	{
+		x->x_beg_hrir_red[index] = vec_hrir_red;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_calc_reduced(t_bin_ambi_reduced_decode_fir *x, float findex)
+{
+	int index=(int)findex - 1;
+	int i, j;
+	int firsize = x->x_firsize;
+	t_float *vec_hrir, *vec_hrir_red;
+	double *dv;
+	int n_ambi = x->x_n_ambi;
+	int n_ls = x->x_n_ind_ls + x->x_n_mrg_mir_ls;
+	float mul;
+
+	if(x->x_seq_ok)
+	{
+		if(index < 0)
+			index = 0;
+		if(index >= n_ambi)
+			index = n_ambi - 1;
+
+		vec_hrir_red = x->x_beg_hrir_red[index];
+
+		dv = x->x_prod3 + index;
+		mul = (float)(*dv);
+		vec_hrir = x->x_beg_hrir;
+		for(i=0; i<firsize; i++)/*first step of acumulating the HRIRs*/
+		{
+			vec_hrir_red[i] = mul * vec_hrir[i];
+		}
+
+		for(j=1; j<n_ls; j++)
+		{
+			dv += n_ambi;
+			mul = (float)(*dv);
+			vec_hrir = x->x_beg_hrir;
+			vec_hrir += j * firsize;
+			for(i=0; i<firsize; i++)
+			{
+				vec_hrir_red[i] += mul * vec_hrir[i];
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_calc_sym(t_bin_ambi_reduced_decode_fir *x)
+{
+	int *sym=x->x_phi_sym;
+	int n_ls=x->x_n_ind_ls+x->x_n_mrg_mir_ls;
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int *phi=x->x_phi;
+	int *delta=x->x_delta;
+	int *flag=x->x_sym_flag;
+	int i, j, d, p, regular=1;
+	double *dv, *db=x->x_prod3;
+	double a, b, q;
+	int sym_max=0;
+	int pos_sym_counter, neg_sym_counter;
+	char plus_minus[100];
+	char abc[100];
+	char onenine[100];
+	char ten[100];
+
+	if(x->x_seq_ok)
+	{
+		for(i=0; i<n_ls; i++)
+			sym[i] = -1;
+
+		plus_minus[0] = 0;
+		if(x->x_n_dim == 2)
+		{
+			strcpy(abc,     "                      WXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXY");
+			strcpy(ten,     "                      000000000000000000011111111111111111111");
+			strcpy(onenine, "                      011223344556677889900112233445566778899");
+			abc[n_ambi+22] = 0;
+			ten[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(ten);
+			post(onenine);
+		}
+		else
+		{
+			strcpy(abc,     "                      AABCABCDEABCDEFGABCDEFGHIABCDEFGHIJKABCDEFGHIJKLM");
+			strcpy(onenine, "                      0111222223333333444444444555555555556666666666666");
+			abc[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(onenine);
+		}
+
+		for(i=0; i<n_ls; i++)/* looking for azimuth symmetries of loudspeakers */
+		{
+			d = delta[i];
+			p = phi[i];
+			for(j=i+1; j<n_ls; j++)
+			{
+				if(d == delta[j])
+				{
+					if((p + phi[j]) == 360)
+					{
+						if((sym[i] < 0) && (sym[j] < 0))
+						{
+							sym[i] = j;
+							sym[j] = i;
+							j = n_ls + 1;
+							sym_max++;
+						}
+					}
+				}
+			}
+		}
+
+		for(p=0; p<n_ambi; p++)/*each col*/
+		{
+			pos_sym_counter = 0;
+			neg_sym_counter = 0;
+			for(i=0; i<n_ls; i++)
+				flag[i] = 1;
+			dv = db + p;
+			for(i=0; i<n_ls; i++)
+			{
+				if((sym[i] >= 0) && flag[i])
+				{
+					j = sym[i];
+					flag[i] = 0;
+					flag[j] = 0;
+					a = dv[i*n_ambi];
+					b = dv[j*n_ambi];
+					if((a < 5.0e-4)&&(a > -5.0e-4)&&(b < 5.0e-4)&&(b > -5.0e-4))
+					{
+						pos_sym_counter++;
+						neg_sym_counter++;
+					}
+					else
+					{
+						q = a / b;
+						if((q < 1.005)&&(q > 0.995))
+							pos_sym_counter++;
+						else if((q > -1.005)&&(q < -0.995))
+							neg_sym_counter++;
+					}
+				}
+			}
+			if(pos_sym_counter == sym_max)
+				strcat(plus_minus, "+");
+			else if(neg_sym_counter == sym_max)
+				strcat(plus_minus, "-");
+			else
+			{
+				strcat(plus_minus, "?");
+				regular = 0;
+			}
+		}
+		post("sum of right channel: %s", plus_minus);
+
+		if(regular)
+		{
+			for(i=0; i<n_ambi; i++)
+			{
+				/*change*/
+				if(plus_minus[i] == '+')
+					SETFLOAT(x->x_at, 1.0f);
+				else if(plus_minus[i] == '-')
+					SETFLOAT(x->x_at, 2.0f);
+				SETFLOAT(x->x_at+1, (float)(i+1));
+				outlet_list(x->x_out_sign_sum, &s_list, 2, x->x_at);
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir_ambi_weight(t_bin_ambi_reduced_decode_fir *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(argc > x->x_n_order)
+	{
+		int i, k=0, n=x->x_n_order;
+		double d;
+
+		x->x_ambi_channel_weight[k] = (double)atom_getfloat(argv++);
+		k++;
+		if(x->x_n_dim == 2)
+		{
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+			}
+		}
+		else
+		{
+			int j, m;
+
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				m = 2*i + 1;
+				for(j=0; j<m; j++)
+				{
+					x->x_ambi_channel_weight[k] = d;
+					k++;
+				}
+			}
+		}
+	}
+	else
+		post("bin_ambi_reduced_decode_fir-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
+}
+
+static void bin_ambi_reduced_decode_fir_mirror_weight(t_bin_ambi_reduced_decode_fir *x, t_floatarg f)
+{
+	x->x_mirror_weight = (double)f;
+}
+
+static void bin_ambi_reduced_decode_fir_sing_range(t_bin_ambi_reduced_decode_fir *x, t_floatarg f)
+{
+	if(f < 0.0f)
+		x->x_sing_range = -(double)f;
+	else
+		x->x_sing_range = (double)f;
+}
+
+static void bin_ambi_reduced_decode_fir_free(t_bin_ambi_reduced_decode_fir *x)
+{
+	freebytes(x->x_hrir_filename, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir_red, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_inv_work1, x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_work2, 2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_buf2, 2 * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_transp, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ls_encode, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod2, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod3, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ambi_channel_weight, x->x_n_ambi * sizeof(double));
+
+	freebytes(x->x_delta, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+	freebytes(x->x_phi, (x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+	freebytes(x->x_phi_sym, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+	freebytes(x->x_sym_flag, (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+
+	freebytes(x->x_beg_hrir, x->x_firsize * (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(float));
+	freebytes(x->x_beg_hrir_red, x->x_n_ambi * sizeof(float *));
+}
+
+/*
+  1.arg_ int prefix;
+	2.arg: t_symbol *hrir_name;
+	3.arg: t_symbol *hrir_red_name;
+	4.arg: t_symbol *hrtf_im_name;
+	5.arg: t_symbol *hrir_fade_out_name;
+	6.arg: int ambi_order;
+	7.arg: int dim;
+	8.arg: int number_of_loudspeakers;
+	9.arg: int firsize;
+	*/
+
+static void *bin_ambi_reduced_decode_fir_new(t_symbol *s, int argc, t_atom *argv)
+{
+	t_bin_ambi_reduced_decode_fir *x = (t_bin_ambi_reduced_decode_fir *)pd_new(bin_ambi_reduced_decode_fir_class);
+	char buf[400];
+	int i, j, ok=0;	
+	int n_order=0, n_dim=0, n_ind_ls=0, n_mrg_mir_ls=0, n_ph_ls=0, n_ambi=0, firsize=0, prefix=0;
+	t_symbol	*s_hrir=gensym("L_HRIR");
+	t_symbol	*s_hrir_red=gensym("HRIR_red");
+  t_symbol  *s_fade_out_hrir=gensym("HRIR_win");
+
+	if((argc >= 10) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_SYMBOL(argv,1) &&
+		IS_A_SYMBOL(argv,2) &&
+		IS_A_SYMBOL(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8) &&
+		IS_A_FLOAT(argv,9))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= (t_symbol *)atom_getsymbolarg(1, argc, argv);
+		s_hrir_red						= (t_symbol *)atom_getsymbolarg(2, argc, argv);
+		s_fade_out_hrir	      = (t_symbol *)atom_getsymbolarg(3, argc, argv);
+
+		n_order		= (int)atom_getintarg(4, argc, argv);
+		n_dim			= (int)atom_getintarg(5, argc, argv);
+		n_ind_ls	= (int)atom_getintarg(6, argc, argv);
+		n_mrg_mir_ls	= (int)atom_getintarg(7, argc, argv);
+		n_ph_ls		= (int)atom_getintarg(8, argc, argv);
+		firsize		= (int)atom_getintarg(9, argc, argv);
+
+		ok = 1;
+	}
+	else if((argc >= 10) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_FLOAT(argv,1) &&
+		IS_A_FLOAT(argv,2) &&
+		IS_A_FLOAT(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8) &&
+		IS_A_FLOAT(argv,9))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= gensym("L_HRIR");
+		s_hrir_red							= gensym("HRIR_red");
+		s_fade_out_hrir	      = gensym("HRIR_win");
+
+		n_order		= (int)atom_getintarg(4, argc, argv);
+		n_dim			= (int)atom_getintarg(5, argc, argv);
+		n_ind_ls	= (int)atom_getintarg(6, argc, argv);
+		n_mrg_mir_ls	= (int)atom_getintarg(7, argc, argv);
+		n_ph_ls		= (int)atom_getintarg(8, argc, argv);
+		firsize		= (int)atom_getintarg(9, argc, argv);
+
+		ok = 1;
+	}
+
+	if(ok)
+	{
+		if(n_order < 1)
+			n_order = 1;
+
+		if(n_dim == 3)
+		{
+			if(n_order > 5)
+				n_order = 5;
+			n_ambi = (n_order + 1)*(n_order + 1);
+		}
+		else
+		{
+			if(n_order > 12)
+				n_order = 12;
+			n_dim = 2;
+			n_ambi = 2 * n_order + 1;
+		}
+
+		if(n_ind_ls < 1)
+			n_ind_ls = 1;
+		if(n_mrg_mir_ls < 1)
+			n_mrg_mir_ls = 1;
+		if(n_ph_ls < 0)
+			n_ph_ls = 0;
+
+		if((n_ind_ls+2*n_mrg_mir_ls+n_ph_ls) < n_ambi)
+		{
+			post("bin_ambi_reduced_decode_fir-WARNING: Number of all Loudspeakers < Number of Ambisonic-Channels !!!!");
+		}
+
+		if(firsize < 32)
+			firsize = 32;
+
+		x->x_n_dim			= n_dim;
+		x->x_n_ambi			= n_ambi;
+		x->x_n_ind_ls		= n_ind_ls;
+		x->x_n_mrg_mir_ls		= n_mrg_mir_ls;
+		x->x_n_ph_ls		= n_ph_ls;
+		x->x_n_order		= n_order;
+		x->x_firsize		= firsize;
+
+		x->x_hrir_filename	= (t_symbol **)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+		x->x_s_hrir					= (t_symbol **)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(t_symbol *));
+		x->x_s_hrir_red			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+		
+		j = x->x_n_ind_ls + x->x_n_mrg_mir_ls;
+		for(i=0; i<j; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir->s_name);
+			x->x_s_hrir[i] = gensym(buf);
+		}
+
+		for(i=0; i<n_ambi; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir_red->s_name);
+			x->x_s_hrir_red[i] = gensym(buf);
+		}
+
+    sprintf(buf, "%d_%s", prefix, s_fade_out_hrir->s_name);
+    x->x_s_fade_out_hrir = gensym(buf);
+
+		x->x_inv_work1	= (double *)getbytes(x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_work2	= (double *)getbytes(2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_buf2		= (double *)getbytes(2 * x->x_n_ambi * sizeof(double));
+		x->x_transp			= (double *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+		x->x_ls_encode	= (double *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod2			= (double *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod3			= (double *)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * x->x_n_ambi * sizeof(double));
+		x->x_ambi_channel_weight = (double *)getbytes(x->x_n_ambi * sizeof(double));
+
+		x->x_delta			= (int *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+		x->x_phi				= (int *)getbytes((x->x_n_ind_ls+2*x->x_n_mrg_mir_ls+x->x_n_ph_ls) * sizeof(int));
+		x->x_phi_sym		= (int *)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+		x->x_sym_flag		= (int *)getbytes((x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(int));
+
+		x->x_beg_fade_out_hrir	= (float *)0;
+		x->x_beg_hrir						= (float *)getbytes(x->x_firsize * (x->x_n_ind_ls+x->x_n_mrg_mir_ls) * sizeof(float));
+		x->x_beg_hrir_red				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+
+		x->x_sqrt3				= sqrt(3.0);
+		x->x_sqrt5_2			= sqrt(5.0) / 2.0;
+		x->x_sqrt6_4			= sqrt(6.0) / 4.0;
+		x->x_sqrt10_4			= sqrt(10.0) / 4.0;
+		x->x_sqrt15_2			= sqrt(15.0) / 2.0;
+		x->x_sqrt35_8			= sqrt(35.0) / 8.0;
+		x->x_sqrt70_4			= sqrt(70.0) / 4.0;
+		x->x_sqrt126_16		= sqrt(126.0) / 16.0;
+		x->x_sqrt315_8		= sqrt(315.0) / 8.0;
+		x->x_sqrt105_4		= sqrt(105.0) / 4.0;
+		x->x_pi_over_180	= 4.0 * atan(1.0) / 180.0;
+		x->x_sing_range = 1.0e-10;
+		x->x_seq_ok = 1;
+		for(i=0; i<n_ambi; i++)
+			x->x_ambi_channel_weight[i] = 1.0;
+		x->x_mirror_weight = 0.0;
+
+		outlet_new(&x->x_obj, &s_list);
+		x->x_out_sign_sum = outlet_new(&x->x_obj, &s_list);
+		return(x);
+	}
+	else
+	{
+		post("bin_ambi_reduced_decode_fir-ERROR: need 1 float + 3 symbols + 6 floats arguments:");
+		post("  prefix(unique-number) + hrir_loudspeaker_name + hrir_redused_name + hrir_fade_out_name +");
+		post("   + ambi_order + ambi_dimension + number_of_independent_loudspeakers + ");
+		post("   + number_of_mirrored_and_merged_loudspeakers + number_of_phantom_loudspeakers + firsize");
+		return(0);
+	}
+}
+
+void bin_ambi_reduced_decode_fir_setup(void)
+{
+	bin_ambi_reduced_decode_fir_class = class_new(gensym("bin_ambi_reduced_decode_fir"), (t_newmethod)bin_ambi_reduced_decode_fir_new, (t_method)bin_ambi_reduced_decode_fir_free,
+					 sizeof(t_bin_ambi_reduced_decode_fir), 0, A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_ind_ls, gensym("ind_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_mrg_ls, gensym("mrg_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_mir_ls, gensym("mir_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_pht_ls, gensym("pht_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_mirror_weight, gensym("mirror_weight"), A_DEFFLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_calc_pinv, gensym("calc_pinv"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_load_HRIR, gensym("load_HRIR"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_check_HRIR_LS_arrays, gensym("check_HRIR_LS_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_check_HRIR_RED_arrays, gensym("check_HRIR_RED_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_calc_reduced, gensym("calc_reduced"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_calc_sym, gensym("calc_sym"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_ambi_weight, gensym("ambi_weight"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir_class, (t_method)bin_ambi_reduced_decode_fir_sing_range, gensym("sing_range"), A_DEFFLOAT, 0);
+	class_sethelpsymbol(bin_ambi_reduced_decode_fir_class, gensym("iemhelp2/help-bin_ambi_reduced_decode_fir"));
+}
+/*
+Reihenfolge:
+n_ls x bin_ambi_reduced_decode_fir_ls
+
+bin_ambi_reduced_decode_fir_calc_pinv
+
+n_ls x bin_ambi_reduced_decode_fir_load_HRIR
+
+n_ls x bin_ambi_reduced_decode_fir_check_HRIR_arrays
+
+n_ambi x bin_ambi_reduced_decode_fir_check_HRTF_arrays
+
+n_ambi x bin_ambi_reduced_decode_fir_calc_reduced
+
+bin_ambi_reduced_decode_fir_calc_sym
+
+*/
diff --git a/src/bin_ambi_reduced_decode_fir2.c b/src/bin_ambi_reduced_decode_fir2.c
new file mode 100644
index 0000000..fb0ce92
--- /dev/null
+++ b/src/bin_ambi_reduced_decode_fir2.c
@@ -0,0 +1,1260 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include "iem_bin_ambi.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* -------------------------- bin_ambi_reduced_decode_fir2 ------------------------------ */
+/*
+ ** berechnet ein reduziertes Ambisonic-Decoder-Set in die HRTF-Spektren **
+ ** Inputs: ls + Liste von 3 floats: Index [1 .. 16] + Elevation [-90 .. +90 degree] + Azimut [0 .. 360 degree] **
+ ** Inputs: calc_inv **
+ ** Inputs: load_HRIR + float index1..16 **
+ ** Outputs: List of 2 symbols: left-HRIR-File-name + HRIR-table-name **
+ ** Inputs: calc_reduced **
+ ** "output" ...  writes the HRTF into tables **
+ **  **
+ **  **
+ ** setzt voraus , dass die HRIR-tabele-names von 1016_1_L_HRIR .. 1016_16_L_HRIR heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_re .. 1016_16_HRTF_re heissen und existieren **
+ ** setzt voraus , dass die HRTF-tabele-names von 1016_1_HRTF_im .. 1016_16_HRTF_im heissen und existieren **
+ */
+
+
+typedef struct _bin_ambi_reduced_decode_fir2
+{
+	t_object			x_obj;
+	t_atom				x_at[2];/*output filename and tablename of HRIR*/
+	int						x_n_dim;/*dimension of ambisonic system*/
+	int						x_n_ambi;/*number of ambi channels*/
+	int						x_n_order;/*order of ambisonic system*/
+	int						x_n_real_ls;/*number of real loudspeakers*/
+	int						x_n_pht_ls;/*number of phantom loudspeakers*/
+	int						x_seq_ok;
+	int						x_firsize;/*size of FIR-filter*/
+	double				*x_inv_work1;/* n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_work2;/* 2*n_ambi*n_ambi buffer for matrix inverse */
+	double				*x_inv_buf2;/* 2*n_ambi buffer for matrix inverse */
+	double				*x_transp;/* n_ls*n_ambi transposed input-buffer of decoder-matrix before inversion */
+	double				*x_ls_encode;/* n_ambi*n_ls straight input-buffer of decoder-matrix before inversion */
+	double				*x_prod2;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_prod3;/* n_ls*n_ambi output-buffer of decoder-matrix after inversion */
+	double				*x_ambi_channel_weight;
+	int						*x_delta;
+	int						*x_phi;
+	int						*x_phi_sym;
+	int						*x_sym_flag;
+	float					*x_beg_fade_out_hrir;
+	float					*x_beg_hrir;
+	float					**x_beg_hrir_red;
+	t_symbol			**x_hrir_filename;
+	t_symbol			**x_s_hrir;
+	t_symbol			**x_s_hrir_red;
+	t_symbol			*x_s_fade_out_hrir;
+	void					*x_out_sign_sum;
+	double				x_sqrt3;
+	double				x_sqrt10_4;
+	double				x_sqrt15_2;
+	double				x_sqrt6_4;
+	double				x_sqrt35_8;
+	double				x_sqrt70_4;
+	double				x_sqrt5_2;
+	double				x_sqrt126_16;
+	double				x_sqrt315_8;
+	double				x_sqrt105_4;
+	double				x_pi_over_180;
+	double				x_sing_range;
+} t_bin_ambi_reduced_decode_fir2;
+
+static t_class *bin_ambi_reduced_decode_fir2_class;
+
+static void bin_ambi_reduced_decode_fir2_convert(t_bin_ambi_reduced_decode_fir2 *x, double *delta_deg2rad, double *phi_deg2rad, int index)
+{
+	double q = 1.0;
+	double d = *delta_deg2rad;
+	double p = *phi_deg2rad;
+	int i;
+
+	if(d < -90.0)
+		d = -90.0;
+	if(d > 90.0)
+		d = 90.0;
+	while(p < 0.0)
+		p += 360.0;
+	while(p >= 360.0)
+		p -= 360.0;
+
+	x->x_delta[index] = (int)(d);
+	x->x_phi[index] = (int)(p);
+
+	*delta_deg2rad = d*x->x_pi_over_180;
+	*phi_deg2rad = p*x->x_pi_over_180;
+}
+
+static void bin_ambi_reduced_decode_fir2_do_2d(t_bin_ambi_reduced_decode_fir2 *x, int argc, t_atom *argv, int mode)
+{
+	double delta=0.0, phi;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode_fir2 ERROR: ls-input needs 1 index and 1 angle: ls_index + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	phi = (double)atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_REAL)
+	{
+		if(index >= x->x_n_real_ls)
+			index = x->x_n_real_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_pht_ls)
+		{
+			if(index >= x->x_n_pht_ls)
+				index = x->x_n_pht_ls - 1;
+			index += x->x_n_real_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+
+	bin_ambi_reduced_decode_fir2_convert(x, &delta, &phi, index);
+
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+	*dw++ = cos(phi);
+	*dw++ = sin(phi);
+
+	if(order >= 2)
+	{
+		*dw++ = cos(2.0*phi);
+		*dw++ = sin(2.0*phi);
+
+		if(order >= 3)
+		{
+			*dw++ = cos(3.0*phi);
+			*dw++ = sin(3.0*phi);
+			if(order >= 4)
+			{
+				*dw++ = cos(4.0*phi);
+				*dw++ = sin(4.0*phi);
+
+				if(order >= 5)
+				{
+					*dw++ = cos(5.0*phi);
+					*dw++ = sin(5.0*phi);
+
+					if(order >= 6)
+					{
+						*dw++ = cos(6.0*phi);
+						*dw++ = sin(6.0*phi);
+
+						if(order >= 7)
+						{
+							*dw++ = cos(7.0*phi);
+							*dw++ = sin(7.0*phi);
+
+							if(order >= 8)
+							{
+								*dw++ = cos(8.0*phi);
+								*dw++ = sin(8.0*phi);
+
+								if(order >= 9)
+								{
+									*dw++ = cos(9.0*phi);
+									*dw++ = sin(9.0*phi);
+
+									if(order >= 10)
+									{
+										*dw++ = cos(10.0*phi);
+										*dw++ = sin(10.0*phi);
+
+										if(order >= 11)
+										{
+											*dw++ = cos(11.0*phi);
+											*dw++ = sin(11.0*phi);
+
+											if(order >= 12)
+											{
+												*dw++ = cos(12.0*phi);
+												*dw++ = sin(12.0*phi);
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_do_3d(t_bin_ambi_reduced_decode_fir2 *x, int argc, t_atom *argv, int mode)
+{
+	double delta, phi;
+	double cd, sd, cd2, cd3, sd2, csd, cp, sp, cp2, sp2, cp3, sp3, cp4, sp4;
+	double *dw = x->x_transp;
+	int index;
+	int order=x->x_n_order;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode_fir2 ERROR: ls-input needs 1 index and 2 angles: ls index + delta [degree] + phi [degree]");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	delta = atom_getfloat(argv++);
+	phi = atom_getfloat(argv);
+
+	if(index < 0)
+		index = 0;
+	if(mode == BIN_AMBI_LS_REAL)
+	{
+		if(index >= x->x_n_real_ls)
+			index = x->x_n_real_ls - 1;
+	}
+	else if(mode == BIN_AMBI_LS_PHT)
+	{
+		if(x->x_n_pht_ls)
+		{
+			if(index >= x->x_n_pht_ls)
+				index = x->x_n_pht_ls - 1;
+			index += x->x_n_real_ls;
+		}
+		else
+			return;
+	}
+	else
+		return;
+	
+	bin_ambi_reduced_decode_fir2_convert(x, &delta, &phi, index);
+
+	cd = cos(delta);
+	sd = sin(delta);
+	cp = cos(phi);
+	sp = sin(phi);
+	
+	dw += index * x->x_n_ambi;
+
+	*dw++ = 1.0;
+
+	*dw++ = cd * cp;
+	*dw++ = cd * sp;
+	*dw++ = sd;
+
+	if(order >= 2)
+	{
+		cp2 = cos(2.0*phi);
+		sp2 = sin(2.0*phi);
+		cd2 = cd * cd;
+		sd2 = sd * sd;
+		csd = cd * sd;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * cp2;
+		*dw++ = 0.5 * x->x_sqrt3 * cd2 * sp2;
+		*dw++ = x->x_sqrt3 * csd * cp;
+		*dw++ = x->x_sqrt3 * csd * sp;
+		*dw++ = 0.5 * (3.0 * sd2 - 1.0);
+
+		if(order >= 3)
+		{
+			cp3 = cos(3.0*phi);
+			sp3 = sin(3.0*phi);
+			cd3 = cd2 * cd;
+			*dw++ = x->x_sqrt10_4 * cd3 * cp3;
+			*dw++ = x->x_sqrt10_4 * cd3 * sp3;
+			*dw++ = x->x_sqrt15_2 * cd * csd * cp2;
+			*dw++ = x->x_sqrt15_2 * cd * csd * sp2;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * cp;
+			*dw++ = x->x_sqrt6_4 * cd * (5.0 * sd2 - 1.0) * sp;
+			*dw++ = 0.5 * sd * (5.0 * sd2 - 3.0);
+
+			if(order >= 4)
+			{
+				cp4 = cos(4.0*phi);
+				sp4 = sin(4.0*phi);
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * cp4;
+				*dw++ = x->x_sqrt35_8 * cd2 * cd2 * sp4;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * cp3;
+				*dw++ = x->x_sqrt70_4 * cd2 * csd * sp3;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * cp2;
+				*dw++ = 0.5 * x->x_sqrt5_2 * cd2 * (7.0 * sd2 - 1.0) * sp2;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * cp;
+				*dw++ = x->x_sqrt10_4 * csd * (7.0 * sd2 - 3.0) * sp;
+				*dw++ = 0.125 * (sd2 * (35.0 * sd2 - 30.0) + 3.0);
+
+				if(order >= 5)
+				{
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * cos(5.0*phi);
+					*dw++ = x->x_sqrt126_16 * cd3 * cd2 * sin(5.0*phi);
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * cp4;
+					*dw++ = x->x_sqrt315_8 * cd3 * csd * sp4;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * cp3;
+					*dw++ = 0.25 * x->x_sqrt70_4 * cd3 * (9.0 * sd2 - 1.0) * sp3;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * cp2;
+					*dw++ = x->x_sqrt105_4 * cd * csd * (3.0 * sd2 - 1.0) * sp2;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * cp;
+					*dw++ = 0.25 * x->x_sqrt15_2 * cd * (sd2 * (21.0 * sd2 - 14.0) + 1.0) * sp;
+					*dw = 0.125 * sd * (sd2 * (63.0 * sd2 - 70.0) + 15.0);
+				}
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_real_ls(t_bin_ambi_reduced_decode_fir2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fir2_do_2d(x, argc, argv, BIN_AMBI_LS_REAL);
+	else
+		bin_ambi_reduced_decode_fir2_do_3d(x, argc, argv, BIN_AMBI_LS_REAL);
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fir2_pht_ls(t_bin_ambi_reduced_decode_fir2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(x->x_n_dim == 2)
+		bin_ambi_reduced_decode_fir2_do_2d(x, argc, argv, BIN_AMBI_LS_PHT);
+	else
+		bin_ambi_reduced_decode_fir2_do_3d(x, argc, argv, BIN_AMBI_LS_PHT);
+}
+
+static void bin_ambi_reduced_decode_fir2_copy_row2buf(t_bin_ambi_reduced_decode_fir2 *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*db++ = *dw++;
+}
+
+static void bin_ambi_reduced_decode_fir2_copy_buf2row(t_bin_ambi_reduced_decode_fir2 *x, int row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw++ = *db++;
+}
+
+static void bin_ambi_reduced_decode_fir2_copy_row2row(t_bin_ambi_reduced_decode_fir2 *x, int src_row, int dst_row)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw_src=x->x_inv_work2;
+	double *dw_dst=x->x_inv_work2;
+
+	dw_src += src_row*n_ambi2;
+	dw_dst += dst_row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+		*dw_dst++ = *dw_src++;
+}
+
+static void bin_ambi_reduced_decode_fir2_xch_rows(t_bin_ambi_reduced_decode_fir2 *x, int row1, int row2)
+{
+	bin_ambi_reduced_decode_fir2_copy_row2buf(x, row1);
+	bin_ambi_reduced_decode_fir2_copy_row2row(x, row2, row1);
+	bin_ambi_reduced_decode_fir2_copy_buf2row(x, row2);
+}
+
+static void bin_ambi_reduced_decode_fir2_mul_row(t_bin_ambi_reduced_decode_fir2 *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		(*dw) *= mul;
+		dw++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_mul_col(t_bin_ambi_reduced_decode_fir2 *x, int col, double mul)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+
+	dw += col;
+	for(i=0; i<n_ambi; i++)
+	{
+		(*dw) *= mul;
+		dw += n_ambi2;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_mul_buf_and_add2row(t_bin_ambi_reduced_decode_fir2 *x, int row, double mul)
+{
+	int n_ambi2 = 2*x->x_n_ambi;
+	int i;
+	double *dw=x->x_inv_work2;
+	double *db=x->x_inv_buf2;
+
+	dw += row*n_ambi2;
+	for(i=0; i<n_ambi2; i++)
+	{
+		*dw += (*db)*mul;
+		dw++;
+		db++;
+	}
+}
+
+static int bin_ambi_reduced_decode_fir2_eval_which_element_of_col_not_zero(t_bin_ambi_reduced_decode_fir2 *x, int col, int start_row)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j;
+	double *dw=x->x_inv_work2;
+	double singrange=x->x_sing_range;
+	int ret=-1;
+
+	dw += start_row*n_ambi2 + col;
+	j = 0;
+	for(i=start_row; i<n_ambi; i++)
+	{
+		if((*dw > singrange) || (*dw < -singrange))
+		{
+			ret = i;
+			i = n_ambi+1;
+		}
+		dw += n_ambi2;
+	}
+	return(ret);
+}
+
+static void bin_ambi_reduced_decode_fir2_mul1(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	double *vec1, *beg1=x->x_ls_encode;
+	double *vec2, *beg2=x->x_ls_encode;
+	double *inv=x->x_inv_work1;
+	double sum;
+	int n_ls=x->x_n_real_ls+x->x_n_pht_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j, k;
+
+	for(k=0; k<n_ambi; k++)
+	{
+		beg2=x->x_ls_encode;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ls; i++)
+			{
+				sum += *vec1++ * *vec2++;
+			}
+			beg2 += n_ls;
+			*inv++ = sum;
+		}
+		beg1 += n_ls;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_mul2(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	int n_ls=x->x_n_real_ls+x->x_n_pht_ls;
+	int n_ambi=x->x_n_ambi;
+	int n_ambi2=2*n_ambi;
+	int i, j, k;
+	double *vec1, *beg1=x->x_transp;
+	double *vec2, *beg2=x->x_inv_work2+n_ambi;
+	double *vec3=x->x_prod2;
+	double *acw_vec=x->x_ambi_channel_weight;
+	double sum;
+
+	for(k=0; k<n_ls; k++)
+	{
+		beg2=x->x_inv_work2+n_ambi;
+		for(j=0; j<n_ambi; j++)
+		{
+			sum = 0.0;
+			vec1 = beg1;
+			vec2 = beg2;
+			for(i=0; i<n_ambi; i++)
+			{
+				sum += *vec1++ * *vec2;
+				vec2 += n_ambi2;
+			}
+			beg2++;
+			*vec3++ = sum * acw_vec[j];
+		}
+		beg1 += n_ambi;
+	}
+}
+
+/* wird ersetzt durch haendische spiegelung und reduzierung
+static void bin_ambi_reduced_decode_fir2_mul3(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	int i, n;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+	double *dv1=x->x_prod2;
+	double mw=x->x_mirror_weight;
+
+	n = x->x_n_ind_ls * x->x_n_ambi;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++;
+	dv2 += n;
+	n = x->x_n_mrg_mir_ls * x->x_n_ambi;
+	dv2 += n;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv1++ + (*dv2++)*mw;
+}*/
+
+static void bin_ambi_reduced_decode_fir2_transp_back(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	double *vec, *transp=x->x_transp;
+	double *straight=x->x_ls_encode;
+	int n_ls=x->x_n_real_ls+x->x_n_pht_ls;
+	int n_ambi=x->x_n_ambi;
+	int i, j;
+
+	transp = x->x_transp;
+	for(j=0; j<n_ambi; j++)
+	{
+		vec = transp;
+		for(i=0; i<n_ls; i++)
+		{
+			*straight++ = *vec;
+			vec += n_ambi;
+		}
+		transp++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_inverse(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int i, j, nz;
+	int r,c;
+	double *src=x->x_inv_work1;
+	double *db=x->x_inv_work2;
+	double rcp, *dv;
+
+	dv = db;
+	for(i=0; i<n_ambi; i++) /* init */
+	{
+		for(j=0; j<n_ambi; j++)
+		{
+			*dv++ = *src++;
+		}
+		for(j=0; j<n_ambi; j++)
+		{
+			if(j == i)
+				*dv++ = 1.0;
+			else
+				*dv++ = 0.0;
+		}
+	}
+
+		/* make 1 in main-diagonale, and 0 below */
+	for(i=0; i<n_ambi; i++)
+	{
+		nz = bin_ambi_reduced_decode_fir2_eval_which_element_of_col_not_zero(x, i, i);
+		if(nz < 0)
+		{
+			post("bin_ambi_reduced_decode_fir2 ERROR: matrix not regular !!!!");
+			x->x_seq_ok = 0;
+			return;
+		}
+		else
+		{
+			if(nz != i)
+				bin_ambi_reduced_decode_fir2_xch_rows(x, i, nz);
+			dv = db + i*n_ambi2 + i;
+			rcp = 1.0 /(*dv);
+			bin_ambi_reduced_decode_fir2_mul_row(x, i, rcp);
+			bin_ambi_reduced_decode_fir2_copy_row2buf(x, i);
+			for(j=i+1; j<n_ambi; j++)
+			{
+				dv += n_ambi2;
+				rcp = -(*dv);
+				bin_ambi_reduced_decode_fir2_mul_buf_and_add2row(x, j, rcp);
+			}
+		}
+	}
+
+			/* make 0 above the main diagonale */
+	for(i=n_ambi-1; i>=0; i--)
+	{
+		dv = db + i*n_ambi2 + i;
+		bin_ambi_reduced_decode_fir2_copy_row2buf(x, i);
+		for(j=i-1; j>=0; j--)
+		{
+			dv -= n_ambi2;
+			rcp = -(*dv);
+			bin_ambi_reduced_decode_fir2_mul_buf_and_add2row(x, j, rcp);
+		}
+	}
+
+	post("matrix_inverse regular");
+	x->x_seq_ok = 1;
+}
+
+static void bin_ambi_reduced_decode_fir2_calc_pinv(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	t_garray *a;
+	int npoints;
+	t_float *fadevec;
+	int i, n;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+
+	if((int)(x->x_beg_fade_out_hrir) == 0)
+	{
+		if (!(a = (t_garray *)pd_findbyclass(x->x_s_fade_out_hrir, garray_class)))
+			error("%s: no such array", x->x_s_fade_out_hrir->s_name);
+		else if (!garray_getfloatarray(a, &npoints, &fadevec))
+			error("%s: bad template for bin_ambi_reduced_decode_fir2", x->x_s_fade_out_hrir->s_name);
+		else if (npoints < x->x_firsize)
+			error("%s: bad array-size: %d", x->x_s_fade_out_hrir->s_name, npoints);
+		else
+			x->x_beg_fade_out_hrir = fadevec;
+	}
+
+	bin_ambi_reduced_decode_fir2_transp_back(x);
+	bin_ambi_reduced_decode_fir2_mul1(x);
+	bin_ambi_reduced_decode_fir2_inverse(x);
+	bin_ambi_reduced_decode_fir2_mul2(x);
+	
+	n = x->x_n_real_ls * x->x_n_ambi;
+	for(i=0; i<n; i++)
+		*dv3++ = *dv2++;
+}
+
+/*
+x_prod:
+n_ambi  columns;
+n_ambi    rows;
+*/
+
+static void bin_ambi_reduced_decode_fir2_ipht_ireal_muladd(t_bin_ambi_reduced_decode_fir2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	int n = x->x_n_ambi;
+	int i, pht_index, real_index;
+	double *dv3=x->x_prod3;
+	double *dv2=x->x_prod2;
+	float mw;
+
+	if(argc < 3)
+	{
+		post("bin_ambi_reduced_decode_fir2 ERROR: ipht_ireal_muladd needs 2 index and 1 mirrorweight: pht_ls_index + real_ls_index + mirror_weight_element");
+		return;
+	}
+	pht_index = (int)atom_getint(argv++) - 1;
+	real_index = (int)atom_getint(argv++) - 1;
+	mw = (double)atom_getfloat(argv);
+
+	if(pht_index < 0)
+		pht_index = 0;
+	if(real_index < 0)
+		real_index = 0;
+	if(real_index >= x->x_n_real_ls)
+		real_index = x->x_n_real_ls - 1;
+	if(pht_index >= x->x_n_pht_ls)
+		pht_index = x->x_n_pht_ls - 1;
+
+	dv3 += real_index*x->x_n_ambi;
+	dv2 += (x->x_n_real_ls+pht_index)*x->x_n_ambi;
+	for(i=0; i<n; i++)
+	{
+		*dv3 += (*dv2++)*mw;
+		dv3++;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_load_HRIR(t_bin_ambi_reduced_decode_fir2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	int index;
+	t_symbol *hrirname;
+
+	if(argc < 2)
+	{
+		post("bin_ambi_reduced_decode_fir2 ERROR: load_HRIR needs 1 index and 1 HRIR-wav");
+		return;
+	}
+	index = (int)atom_getint(argv++) - 1;
+	hrirname = atom_getsymbol(argv);
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_real_ls)
+		index = x->x_n_real_ls - 1;
+	x->x_hrir_filename[index] = hrirname;
+
+	SETSYMBOL(x->x_at, x->x_hrir_filename[index]);
+	SETSYMBOL(x->x_at+1, x->x_s_hrir[index]);
+	outlet_list(x->x_obj.ob_outlet, &s_list, 2, x->x_at);
+}
+
+static void bin_ambi_reduced_decode_fir2_check_HRIR_arrays(t_bin_ambi_reduced_decode_fir2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int j, k, n;
+	int firsize = x->x_firsize;
+	t_garray *a;
+	int npoints;
+	t_symbol *hrir;
+	t_float *vec_hrir, *vec, *vec_fade_out_hrir;
+	float decr, sum;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_real_ls)
+		index = x->x_n_real_ls - 1;
+
+	hrir = x->x_s_hrir[index];
+	if (!(a = (t_garray *)pd_findbyclass(hrir, garray_class)))
+		error("%s: no such array", hrir->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir))
+		error("%s: bad template for bin_ambi_reduced_decode_fir2", hrir->s_name);
+	else
+	{
+		if(npoints < firsize)
+		{
+			post("bin_ambi_reduced_decode_fir2-WARNING: %s-array-size: %d < FIR-size: %d", hrir->s_name, npoints, firsize);
+		}
+		vec = x->x_beg_hrir;
+		vec += index * firsize;
+	
+		if((int)(x->x_beg_fade_out_hrir))
+		{
+			vec_fade_out_hrir = x->x_beg_fade_out_hrir;
+			for(j=0; j<firsize; j++)
+				vec[j] = vec_hrir[j]*vec_fade_out_hrir[j];
+		}
+		else
+		{
+			post("no HRIR-fade-out-window found");
+			n = firsize * 3;
+			n /= 4;
+			for(j=0; j<n; j++)
+				vec[j] = vec_hrir[j];
+			sum = 1.0f;
+			decr = 4.0f / (float)firsize;
+			for(j=n, k=0; j<firsize; j++, k++)
+			{
+				sum -= decr;
+				vec[j] = vec_hrir[j] * sum;
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_check_HRIR_RED_arrays(t_bin_ambi_reduced_decode_fir2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	t_garray *a;
+	int npoints;
+	int firsize = x->x_firsize;
+	t_float *vec_hrir_red;
+	t_symbol *hrir_red;
+
+	if(index < 0)
+		index = 0;
+	if(index >= x->x_n_ambi)
+		index = x->x_n_ambi - 1;
+
+	hrir_red = x->x_s_hrir_red[index];
+
+	if (!(a = (t_garray *)pd_findbyclass(hrir_red, garray_class)))
+		error("%s: no such array", hrir_red->s_name);
+	else if (!garray_getfloatarray(a, &npoints, &vec_hrir_red))
+		error("%s: bad template for bin_ambi_reduced_decode_fir2", hrir_red->s_name);
+	else if (npoints < firsize)
+		error("%s: bad array-size: %d", hrir_red->s_name, npoints);
+	else
+	{
+		x->x_beg_hrir_red[index] = vec_hrir_red;
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_calc_reduced(t_bin_ambi_reduced_decode_fir2 *x, float findex)
+{
+	int index=(int)findex - 1;
+	int i, j;
+	int firsize = x->x_firsize;
+	t_float *vec_hrir, *vec_hrir_red;
+	double *dv;
+	int n_ambi = x->x_n_ambi;
+	int n_ls = x->x_n_real_ls;
+	float mul;
+
+	if(x->x_seq_ok)
+	{
+		if(index < 0)
+			index = 0;
+		if(index >= n_ambi)
+			index = n_ambi - 1;
+
+		vec_hrir_red = x->x_beg_hrir_red[index];
+
+		dv = x->x_prod3 + index;
+		mul = (float)(*dv);
+		vec_hrir = x->x_beg_hrir;
+		for(i=0; i<firsize; i++)/*first step of acumulating the HRIRs*/
+		{
+			vec_hrir_red[i] = mul * vec_hrir[i];
+		}
+
+		for(j=1; j<n_ls; j++)
+		{
+			dv += n_ambi;
+			mul = (float)(*dv);
+			vec_hrir = x->x_beg_hrir;
+			vec_hrir += j * firsize;
+			for(i=0; i<firsize; i++)
+			{
+				vec_hrir_red[i] += mul * vec_hrir[i];
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_calc_sym(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	int *sym=x->x_phi_sym;
+	int n_ls = x->x_n_real_ls;
+	int n_ambi = x->x_n_ambi;
+	int n_ambi2 = 2*n_ambi;
+	int *phi=x->x_phi;
+	int *delta=x->x_delta;
+	int *flag=x->x_sym_flag;
+	int i, j, d, p, regular=1;
+	double *dv, *db=x->x_prod3;
+	double a, b, q;
+	int sym_max=0;
+	int pos_sym_counter, neg_sym_counter;
+	char plus_minus[100];
+	char abc[100];
+	char onenine[100];
+	char ten[100];
+
+	if(x->x_seq_ok)
+	{
+		for(i=0; i<n_ls; i++)
+			sym[i] = -1;
+
+		plus_minus[0] = 0;
+		if(x->x_n_dim == 2)
+		{
+			strcpy(abc,     "                      WXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXYXY");
+			strcpy(ten,     "                      000000000000000000011111111111111111111");
+			strcpy(onenine, "                      011223344556677889900112233445566778899");
+			abc[n_ambi+22] = 0;
+			ten[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(ten);
+			post(onenine);
+		}
+		else
+		{
+			strcpy(abc,     "                      AABCABCDEABCDEFGABCDEFGHIABCDEFGHIJKABCDEFGHIJKLM");
+			strcpy(onenine, "                      0111222223333333444444444555555555556666666666666");
+			abc[n_ambi+22] = 0;
+			onenine[n_ambi+22] = 0;
+			post(abc);
+			post(onenine);
+		}
+
+		for(i=0; i<n_ls; i++)/* looking for azimuth symmetries of loudspeakers */
+		{
+			d = delta[i];
+			p = phi[i];
+			for(j=i+1; j<n_ls; j++)
+			{
+				if(d == delta[j])
+				{
+					if((p + phi[j]) == 360)
+					{
+						if((sym[i] < 0) && (sym[j] < 0))
+						{
+							sym[i] = j;
+							sym[j] = i;
+							j = n_ls + 1;
+							sym_max++;
+						}
+					}
+				}
+			}
+		}
+
+		for(p=0; p<n_ambi; p++)/*each col*/
+		{
+			pos_sym_counter = 0;
+			neg_sym_counter = 0;
+			for(i=0; i<n_ls; i++)
+				flag[i] = 1;
+			dv = db + p;
+			for(i=0; i<n_ls; i++)
+			{
+				if((sym[i] >= 0) && flag[i])
+				{
+					j = sym[i];
+					flag[i] = 0;
+					flag[j] = 0;
+					a = dv[i*n_ambi];
+					b = dv[j*n_ambi];
+					if((a < 5.0e-4)&&(a > -5.0e-4)&&(b < 5.0e-4)&&(b > -5.0e-4))
+					{
+						pos_sym_counter++;
+						neg_sym_counter++;
+					}
+					else
+					{
+						q = a / b;
+						if((q < 1.005)&&(q > 0.995))
+							pos_sym_counter++;
+						else if((q > -1.005)&&(q < -0.995))
+							neg_sym_counter++;
+					}
+				}
+			}
+			if(pos_sym_counter == sym_max)
+				strcat(plus_minus, "+");
+			else if(neg_sym_counter == sym_max)
+				strcat(plus_minus, "-");
+			else
+			{
+				strcat(plus_minus, "?");
+				regular = 0;
+			}
+		}
+		post("sum of right channel: %s", plus_minus);
+
+		if(regular)
+		{
+			for(i=0; i<n_ambi; i++)
+			{
+				/*change*/
+				if(plus_minus[i] == '+')
+					SETFLOAT(x->x_at, 1.0f);
+				else if(plus_minus[i] == '-')
+					SETFLOAT(x->x_at, 2.0f);
+				SETFLOAT(x->x_at+1, (float)(i+1));
+				outlet_list(x->x_out_sign_sum, &s_list, 2, x->x_at);
+			}
+		}
+	}
+}
+
+static void bin_ambi_reduced_decode_fir2_ambi_weight(t_bin_ambi_reduced_decode_fir2 *x, t_symbol *s, int argc, t_atom *argv)
+{
+	if(argc > x->x_n_order)
+	{
+		int i, k=0, n=x->x_n_order;
+		double d;
+
+		x->x_ambi_channel_weight[k] = (double)atom_getfloat(argv++);
+		k++;
+		if(x->x_n_dim == 2)
+		{
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+				x->x_ambi_channel_weight[k] = d;
+				k++;
+			}
+		}
+		else
+		{
+			int j, m;
+
+			for(i=1; i<=n; i++)
+			{
+				d = (double)atom_getfloat(argv++);
+				m = 2*i + 1;
+				for(j=0; j<m; j++)
+				{
+					x->x_ambi_channel_weight[k] = d;
+					k++;
+				}
+			}
+		}
+	}
+	else
+		post("bin_ambi_reduced_decode_fir2-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
+}
+
+static void bin_ambi_reduced_decode_fir2_sing_range(t_bin_ambi_reduced_decode_fir2 *x, t_floatarg f)
+{
+	if(f < 0.0f)
+		x->x_sing_range = -(double)f;
+	else
+		x->x_sing_range = (double)f;
+}
+
+static void bin_ambi_reduced_decode_fir2_free(t_bin_ambi_reduced_decode_fir2 *x)
+{
+	freebytes(x->x_hrir_filename, x->x_n_real_ls * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir, x->x_n_real_ls * sizeof(t_symbol *));
+	freebytes(x->x_s_hrir_red, x->x_n_ambi * sizeof(t_symbol *));
+	freebytes(x->x_inv_work1, x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_work2, 2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_inv_buf2, 2 * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_transp, (x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ls_encode, (x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod2, (x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_prod3, x->x_n_real_ls * x->x_n_ambi * sizeof(double));
+	freebytes(x->x_ambi_channel_weight, x->x_n_ambi * sizeof(double));
+
+	freebytes(x->x_delta, (x->x_n_real_ls+x->x_n_pht_ls)* sizeof(int));
+	freebytes(x->x_phi, (x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+	freebytes(x->x_phi_sym, x->x_n_real_ls * sizeof(int));
+	freebytes(x->x_sym_flag, x->x_n_real_ls * sizeof(int));
+
+	freebytes(x->x_beg_hrir, x->x_firsize * x->x_n_real_ls * sizeof(float));
+	freebytes(x->x_beg_hrir_red, x->x_n_ambi * sizeof(float *));
+}
+
+/*
+  1.arg_ int prefix;
+	2.arg: t_symbol *hrir_name;
+	3.arg: t_symbol *hrir_red_name;
+	4.arg: t_symbol *hrtf_im_name;
+	5.arg: t_symbol *hrir_fade_out_name;
+	6.arg: int ambi_order;
+	7.arg: int dim;
+	8.arg: int number_of_loudspeakers;
+	9.arg: int firsize;
+	*/
+
+static void *bin_ambi_reduced_decode_fir2_new(t_symbol *s, int argc, t_atom *argv)
+{
+	t_bin_ambi_reduced_decode_fir2 *x = (t_bin_ambi_reduced_decode_fir2 *)pd_new(bin_ambi_reduced_decode_fir2_class);
+	char buf[400];
+	int i, j, ok=0;
+	int n_order=0, n_dim=0, n_real_ls=0, n_pht_ls=0, n_ambi=0, firsize=0, prefix=0;
+	t_symbol	*s_hrir=gensym("L_HRIR");
+	t_symbol	*s_hrir_red=gensym("HRIR_red");
+  t_symbol  *s_fade_out_hrir=gensym("HRIR_win");
+
+	if((argc >= 9) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_SYMBOL(argv,1) &&
+		IS_A_SYMBOL(argv,2) &&
+		IS_A_SYMBOL(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= (t_symbol *)atom_getsymbolarg(1, argc, argv);
+		s_hrir_red						= (t_symbol *)atom_getsymbolarg(2, argc, argv);
+		s_fade_out_hrir	      = (t_symbol *)atom_getsymbolarg(3, argc, argv);
+
+		n_order		= (int)atom_getintarg(4, argc, argv);
+		n_dim			= (int)atom_getintarg(5, argc, argv);
+		n_real_ls	= (int)atom_getintarg(6, argc, argv);
+		n_pht_ls	= (int)atom_getintarg(7, argc, argv);
+		firsize		= (int)atom_getintarg(8, argc, argv);
+
+		ok = 1;
+	}
+	else if((argc >= 9) &&
+		IS_A_FLOAT(argv,0) &&
+    IS_A_FLOAT(argv,1) &&
+		IS_A_FLOAT(argv,2) &&
+		IS_A_FLOAT(argv,3) &&
+		IS_A_FLOAT(argv,4) &&
+		IS_A_FLOAT(argv,5) &&
+		IS_A_FLOAT(argv,6) &&
+		IS_A_FLOAT(argv,7) &&
+		IS_A_FLOAT(argv,8))
+	{
+		prefix	= (int)atom_getintarg(0, argc, argv);
+
+		s_hrir								= gensym("L_HRIR");
+		s_hrir_red						= gensym("HRIR_red");
+		s_fade_out_hrir	      = gensym("HRIR_win");
+
+		n_order		= (int)atom_getintarg(4, argc, argv);
+		n_dim			= (int)atom_getintarg(5, argc, argv);
+		n_real_ls	= (int)atom_getintarg(6, argc, argv);
+		n_pht_ls	= (int)atom_getintarg(7, argc, argv);
+		firsize		= (int)atom_getintarg(8, argc, argv);
+
+		ok = 1;
+	}
+
+	if(ok)
+	{
+		if(n_order < 1)
+			n_order = 1;
+
+		if(n_dim == 3)
+		{
+			if(n_order > 5)
+				n_order = 5;
+			n_ambi = (n_order + 1)*(n_order + 1);
+		}
+		else
+		{
+			if(n_order > 12)
+				n_order = 12;
+			n_dim = 2;
+			n_ambi = 2 * n_order + 1;
+		}
+
+		if(n_real_ls < 1)
+			n_real_ls = 1;
+		if(n_pht_ls < 0)
+			n_pht_ls = 0;
+
+		if((n_real_ls+n_pht_ls) < n_ambi)
+		{
+			post("bin_ambi_reduced_decode_fir2-WARNING: Number of all Loudspeakers < Number of Ambisonic-Channels !!!!");
+		}
+
+		if(firsize < 32)
+			firsize = 32;
+
+		x->x_n_dim			= n_dim;
+		x->x_n_ambi			= n_ambi;
+		x->x_n_real_ls	= n_real_ls;
+		x->x_n_pht_ls		= n_pht_ls;
+		x->x_n_order		= n_order;
+		x->x_firsize		= firsize;
+
+		x->x_hrir_filename	= (t_symbol **)getbytes(x->x_n_real_ls * sizeof(t_symbol *));
+		x->x_s_hrir					= (t_symbol **)getbytes(x->x_n_real_ls * sizeof(t_symbol *));
+		x->x_s_hrir_red			= (t_symbol **)getbytes(x->x_n_ambi * sizeof(t_symbol *));
+		
+		j = x->x_n_real_ls;
+		for(i=0; i<j; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir->s_name);
+			x->x_s_hrir[i] = gensym(buf);
+		}
+
+		for(i=0; i<n_ambi; i++)
+		{
+			sprintf(buf, "%d_%d_%s", prefix, i+1, s_hrir_red->s_name);
+			x->x_s_hrir_red[i] = gensym(buf);
+		}
+
+    sprintf(buf, "%d_%s", prefix, s_fade_out_hrir->s_name);
+    x->x_s_fade_out_hrir = gensym(buf);
+
+		x->x_inv_work1	= (double *)getbytes(x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_work2	= (double *)getbytes(2 * x->x_n_ambi * x->x_n_ambi * sizeof(double));
+		x->x_inv_buf2		= (double *)getbytes(2 * x->x_n_ambi * sizeof(double));
+		x->x_transp			= (double *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+		x->x_ls_encode	= (double *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod2			= (double *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * x->x_n_ambi * sizeof(double));
+		x->x_prod3			= (double *)getbytes(x->x_n_real_ls * x->x_n_ambi * sizeof(double));
+		x->x_ambi_channel_weight = (double *)getbytes(x->x_n_ambi * sizeof(double));
+
+		x->x_delta			= (int *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+		x->x_phi				= (int *)getbytes((x->x_n_real_ls+x->x_n_pht_ls) * sizeof(int));
+		x->x_phi_sym		= (int *)getbytes(x->x_n_real_ls * sizeof(int));
+		x->x_sym_flag		= (int *)getbytes(x->x_n_real_ls * sizeof(int));
+
+		x->x_beg_fade_out_hrir	= (float *)0;
+		x->x_beg_hrir						= (float *)getbytes(x->x_firsize * x->x_n_real_ls * sizeof(float));
+		x->x_beg_hrir_red				= (float **)getbytes(x->x_n_ambi * sizeof(float *));
+
+		x->x_sqrt3				= sqrt(3.0);
+		x->x_sqrt5_2			= sqrt(5.0) / 2.0;
+		x->x_sqrt6_4			= sqrt(6.0) / 4.0;
+		x->x_sqrt10_4			= sqrt(10.0) / 4.0;
+		x->x_sqrt15_2			= sqrt(15.0) / 2.0;
+		x->x_sqrt35_8			= sqrt(35.0) / 8.0;
+		x->x_sqrt70_4			= sqrt(70.0) / 4.0;
+		x->x_sqrt126_16		= sqrt(126.0) / 16.0;
+		x->x_sqrt315_8		= sqrt(315.0) / 8.0;
+		x->x_sqrt105_4		= sqrt(105.0) / 4.0;
+		x->x_pi_over_180	= 4.0 * atan(1.0) / 180.0;
+		x->x_sing_range = 1.0e-10;
+		x->x_seq_ok = 1;
+		for(i=0; i<n_ambi; i++)
+			x->x_ambi_channel_weight[i] = 1.0;
+
+		outlet_new(&x->x_obj, &s_list);
+		x->x_out_sign_sum = outlet_new(&x->x_obj, &s_list);
+		return(x);
+	}
+	else
+	{
+		post("bin_ambi_reduced_decode_fir2-ERROR: need 1 float + 3 symbols + 5 floats arguments:");
+		post("  prefix(unique-number) + hrir_loudspeaker_name + hrir_redused_name + hrir_fade_out_name +");
+		post("   + ambi_order + ambi_dimension + number_of_real_loudspeakers + ");
+		post("   + number_of_phantom_loudspeakers + firsize");
+		return(0);
+	}
+}
+
+void bin_ambi_reduced_decode_fir2_setup(void)
+{
+	bin_ambi_reduced_decode_fir2_class = class_new(gensym("bin_ambi_reduced_decode_fir2"), (t_newmethod)bin_ambi_reduced_decode_fir2_new, (t_method)bin_ambi_reduced_decode_fir2_free,
+					 sizeof(t_bin_ambi_reduced_decode_fir2), 0, A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_real_ls, gensym("real_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_pht_ls, gensym("pht_ls"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_calc_pinv, gensym("calc_pinv"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_ipht_ireal_muladd, gensym("ipht_ireal_muladd"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_load_HRIR, gensym("load_HRIR"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_check_HRIR_arrays, gensym("check_HRIR_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_check_HRIR_RED_arrays, gensym("check_HRIR_RED_arrays"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_calc_reduced, gensym("calc_reduced"), A_FLOAT, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_calc_sym, gensym("calc_sym"), 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_ambi_weight, gensym("ambi_weight"), A_GIMME, 0);
+	class_addmethod(bin_ambi_reduced_decode_fir2_class, (t_method)bin_ambi_reduced_decode_fir2_sing_range, gensym("sing_range"), A_DEFFLOAT, 0);
+	class_sethelpsymbol(bin_ambi_reduced_decode_fir2_class, gensym("iemhelp2/help-bin_ambi_reduced_decode_fir2"));
+}
+/*
+Reihenfolge:
+n_ls x bin_ambi_reduced_decode_fir2_ls
+
+bin_ambi_reduced_decode_fir2_calc_pinv
+
+n_ls x bin_ambi_reduced_decode_fir2_load_HRIR
+
+n_ls x bin_ambi_reduced_decode_fir2_check_HRIR_arrays
+
+n_ambi x bin_ambi_reduced_decode_fir2_check_HRTF_arrays
+
+n_ambi x bin_ambi_reduced_decode_fir2_calc_reduced
+
+bin_ambi_reduced_decode_fir2_calc_sym
+
+*/
diff --git a/src/iem_bin_ambi.c b/src/iem_bin_ambi.c
index a580f76..3af6646 100644
--- a/src/iem_bin_ambi.c
+++ b/src/iem_bin_ambi.c
@@ -1,7 +1,7 @@
 /* For information on usage and redistribution, and for a DISCLAIMER OF ALL
 * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
 
-iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
 
 #ifdef NT
 #pragma warning( disable : 4244 )
@@ -21,12 +21,26 @@ static void *iem_bin_ambi_new(void)
 	return (x);
 }
 
+void bin_ambi_calc_HRTF_setup(void);
+void bin_ambi_reduced_decode_setup(void);
+void bin_ambi_reduced_decode2_setup(void);
+void bin_ambi_reduced_decode_fft_setup(void);
+void bin_ambi_reduced_decode_fir_setup(void);
+void bin_ambi_reduced_decode_fft2_setup(void);
+void bin_ambi_reduced_decode_fir2_setup(void);
+
 /* ------------------------ setup routine ------------------------- */
-void iem_bin_ambi_sources_setup(void);
 
 void iem_bin_ambi_setup(void)
 {
-	iem_bin_ambi_sources_setup();
-
-	post("iem_bin_ambi (R-1.15) library loaded!");
+	bin_ambi_calc_HRTF_setup();
+	bin_ambi_reduced_decode_setup();
+	bin_ambi_reduced_decode2_setup();
+	bin_ambi_reduced_decode_fft_setup();
+	bin_ambi_reduced_decode_fir_setup();
+	bin_ambi_reduced_decode_fft2_setup();
+	bin_ambi_reduced_decode_fir2_setup();
+
+    post("iem_bin_ambi (R-1.16) library loaded!   (c) Thomas Musil 05.2005");
+	post("   musil%ciem.at iem KUG Graz Austria", '@');
 }
diff --git a/src/iem_bin_ambi.h b/src/iem_bin_ambi.h
index 1757d2e..a9291c7 100644
--- a/src/iem_bin_ambi.h
+++ b/src/iem_bin_ambi.h
@@ -1,11 +1,17 @@
 /* For information on usage and redistribution, and for a DISCLAIMER OF ALL
 * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
 
-iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
 
 #ifndef __IEMBINAMBI_H__
 #define __IEMBINAMBI_H__
 
+#define BIN_AMBI_LS_REAL 0
+#define BIN_AMBI_LS_IND 0
+#define BIN_AMBI_LS_MRG 1
+#define BIN_AMBI_LS_MIR 2
+#define BIN_AMBI_LS_PHT 3
+
 typedef struct
 {
     float real;
diff --git a/src/iemlib.h b/src/iemlib.h
index 48a02bd..c71b0ed 100644
--- a/src/iemlib.h
+++ b/src/iemlib.h
@@ -1,7 +1,7 @@
 /* For information on usage and redistribution, and for a DISCLAIMER OF ALL
 * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
 
-iem_bin_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+iemlib.h written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
 
 #ifndef __IEMLIB_H__
 #define __IEMLIB_H__
@@ -33,28 +33,40 @@ extern int sys_noloadbang;
 
 #define UNITBIT32 1572864.  /* 3*2^19; bit 32 has place value 1 */
 
-    /* machine-dependent definitions.  These ifdefs really
-    should have been by CPU type and not by operating system! */
+/* machine-dependent definitions.  These ifdefs really
+should have been by CPU type and not by operating system! */
 #ifdef IRIX
-    /* big-endian.  Most significant byte is at low address in memory */
+/* big-endian.  Most significant byte is at low address in memory */
 #define HIOFFSET 0    /* word offset to find MSB */
 #define LOWOFFSET 1    /* word offset to find LSB */
 #define int32 long  /* a data type that has 32 bits */
 #else
-#ifdef NT
-    /* little-endian; most significant byte is at highest address */
+#ifdef MSW
+/* little-endian; most significant byte is at highest address */
 #define HIOFFSET 1
 #define LOWOFFSET 0
 #define int32 long
 #else
-#ifdef  __linux__
+#ifdef __FreeBSD__
+#include <machine/endian.h>
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define HIOFFSET 1
+#define LOWOFFSET 0
+#else
+#define HIOFFSET 0    /* word offset to find MSB */
+#define LOWOFFSET 1    /* word offset to find LSB */
+#endif /* BYTE_ORDER */
+#include <sys/types.h>
+#define int32 int32_t
+#endif
+#ifdef __linux__
 
 #include <endian.h>
 
 #if !defined(__BYTE_ORDER) || !defined(__LITTLE_ENDIAN)                         
 #error No byte order defined                                                    
 #endif                                                                          
-                                                                                
+
 #if __BYTE_ORDER == __LITTLE_ENDIAN                                             
 #define HIOFFSET 1                                                              
 #define LOWOFFSET 0                                                             
@@ -66,14 +78,25 @@ extern int sys_noloadbang;
 #include <sys/types.h>
 #define int32 int32_t
 
+#else
+#ifdef __APPLE__
+#define HIOFFSET 0    /* word offset to find MSB */
+#define LOWOFFSET 1    /* word offset to find LSB */
+#define int32 int  /* a data type that has 32 bits */
+
+#endif /* __APPLE__ */
 #endif /* __linux__ */
-#endif /* NT */
+#endif /* MSW */
 #endif /* SGI */
 
 union tabfudge
 {
-    double tf_d;
-    int32 tf_i[2];
+  double tf_d;
+  int32 tf_i[2];
 };
 
+#define IEM_DENORMAL(f) ((((*(unsigned int*)&(f))&0x60000000)==0) || \
+(((*(unsigned int*)&(f))&0x60000000)==0x60000000))
+/* more stringent test: anything not between 1e-19 and 1e19 in absolute val */
+
 #endif
diff --git a/src/makefile_win b/src/makefile_win
index a7ba3db..80f6286 100644
--- a/src/makefile_win
+++ b/src/makefile_win
@@ -1,39 +1,43 @@
-

-all: iem_bin_ambi.dll

-

-VIS_CPP_PATH = "C:\Programme\Microsoft Visual Studio\Vc98"

-

-PD_INST_PATH = "C:\Programme\pd"

-

-PD_WIN_INCLUDE_PATH = /I. /I$(PD_INST_PATH)\src /I$(VIS_CPP_PATH)\include

-

-PD_WIN_C_FLAGS = /nologo /W3 /WX /DMSW /DNT /DPD /DWIN32 /DWINDOWS /Ox -DPA_LITTLE_ENDIAN

-

-PD_WIN_L_FLAGS = /nologo

-

-PD_WIN_LIB = /NODEFAULTLIB:libc /NODEFAULTLIB:oldnames /NODEFAULTLIB:kernel /NODEFAULTLIB:uuid \

-	$(VIS_CPP_PATH)\lib\libc.lib \

-	$(VIS_CPP_PATH)\lib\oldnames.lib \

-	$(VIS_CPP_PATH)\lib\kernel32.lib \

-	$(VIS_CPP_PATH)\lib\wsock32.lib \

-	$(VIS_CPP_PATH)\lib\winmm.lib \

-	$(PD_INST_PATH)\bin\pthreadVC.lib \

-	$(PD_INST_PATH)\bin\pd.lib

-

-

-SRC =	bin_ambi_calc_HRTF.c \

-		bin_ambi_reduced_decode.c \

-		iem_bin_ambi.c

-

-

-OBJ = $(SRC:.c=.obj)

-

-.c.obj:

-	cl $(PD_WIN_C_FLAGS) $(PD_WIN_INCLUDE_PATH) /c $*.c

-

-iem_bin_ambi.dll: $(OBJ)

-	link $(PD_WIN_L_FLAGS) /dll /export:iem_bin_ambi_setup \

-        /out:iem_bin_ambi.dll $(OBJ) $(PD_WIN_LIB)

-

-clean:

-	del *.obj

+
+all: iem_bin_ambi.dll
+
+VIS_CPP_PATH = "C:\Programme\Microsoft Visual Studio\Vc98"
+
+PD_INST_PATH = "C:\Programme\pd"
+
+PD_WIN_INCLUDE_PATH = /I. /I$(PD_INST_PATH)\src /I$(VIS_CPP_PATH)\include
+
+PD_WIN_C_FLAGS = /nologo /W3 /WX /DMSW /DNT /DPD /DWIN32 /DWINDOWS /Ox -DPA_LITTLE_ENDIAN
+
+PD_WIN_L_FLAGS = /nologo
+
+PD_WIN_LIB = /NODEFAULTLIB:libc /NODEFAULTLIB:oldnames /NODEFAULTLIB:kernel /NODEFAULTLIB:uuid \
+	$(VIS_CPP_PATH)\lib\libc.lib \
+	$(VIS_CPP_PATH)\lib\oldnames.lib \
+	$(VIS_CPP_PATH)\lib\kernel32.lib \
+	$(VIS_CPP_PATH)\lib\wsock32.lib \
+	$(VIS_CPP_PATH)\lib\winmm.lib \
+	$(PD_INST_PATH)\bin\pd.lib
+
+
+SRC =	bin_ambi_calc_HRTF.c \
+	bin_ambi_reduced_decode.c \
+	bin_ambi_reduced_decode2.c \
+	bin_ambi_reduced_decode_fft.c \
+	bin_ambi_reduced_decode_fir.c \
+	bin_ambi_reduced_decode_fft2.c \
+	bin_ambi_reduced_decode_fir2.c \
+	iem_bin_ambi.c
+
+
+OBJ = $(SRC:.c=.obj)
+
+.c.obj:
+	cl $(PD_WIN_C_FLAGS) $(PD_WIN_INCLUDE_PATH) /c $*.c
+
+iem_bin_ambi.dll: $(OBJ)
+	link $(PD_WIN_L_FLAGS) /dll /export:iem_bin_ambi_setup \
+	/out:iem_bin_ambi.dll $(OBJ) $(PD_WIN_LIB)
+
+clean:
+	del *.obj