This commit was generated by cvs2svn to compensate for changes in r3611,

which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/ekext/; revision=3612

9 files changed, 978 insertions, 0 deletions

diff --git a/lpc~/lpc_anal/lpc_test.pd b/lpc~/lpc_anal/lpc_test.pd
new file mode 100644
index 0000000..7c9faea
--- /dev/null
+++ b/lpc~/lpc_anal/lpc_test.pd
@@ -0,0 +1,53 @@
+#N canvas 0 0 917 300 10;
+#X obj 185 160 lpc~ 10;
+#N canvas 0 0 450 300 playsound 0;
+#X obj 68 74 inlet;
+#X obj 163 76 inlet;
+#X obj 163 93 openpanel;
+#X msg 163 110 read -resize \$1 testfile;
+#X obj 26 91 tabplay~ testfile;
+#X obj 163 127 soundfiler;
+#X obj 163 144 / 44.1;
+#X obj 163 161 outlet;
+#X obj 26 108 outlet~;
+#X obj 99 149 outlet;
+#X connect 0 0 4 0;
+#X connect 0 0 9 0;
+#X connect 1 0 2 0;
+#X connect 2 0 3 0;
+#X connect 3 0 5 0;
+#X connect 4 0 8 0;
+#X connect 5 0 6 0;
+#X connect 6 0 7 0;
+#X restore 185 119 pd playsound;
+#N canvas 0 0 450 300 graph1 0;
+#X array testfile 1.7683e+06 float 0;
+#X coords 0 1 1.7683e+06 -1 200 140 1;
+#X restore 516 19 graph;
+#X obj 264 104 bng 15 250 50 0 empty empty load 0 -6 0 8 -262144 -1
+-1;
+#X obj 185 104 bng 15 250 50 0 empty empty play 0 -6 0 8 -262144 -1
+-1;
+#X obj 134 118 metro;
+#X obj 134 103 tgl 15 0 empty empty loop 0 -6 0 8 -262144 -1 -1 0 1
+;
+#X obj 185 230 dac~;
+#X obj 329 37 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0 1
+;
+#X msg 329 68 \; pd dsp \$1;
+#X floatatom 242 142 5 1 100 0 poles - -;
+#X obj 184 183 lpreson~;
+#X obj 185 206 hip~ 18;
+#X connect 0 0 11 0;
+#X connect 0 1 11 0;
+#X connect 1 0 0 0;
+#X connect 1 2 5 1;
+#X connect 3 0 1 1;
+#X connect 4 0 1 0;
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+#X connect 10 0 0 1;
+#X connect 11 0 12 0;
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+#X connect 12 0 7 1;
diff --git a/lpc~/lpc_anal/lpc~.c b/lpc~/lpc_anal/lpc~.c
new file mode 100644
index 0000000..c9ad667
--- /dev/null
+++ b/lpc~/lpc_anal/lpc~.c
@@ -0,0 +1,203 @@
+/*  Linear Predictive Coding - PARCOR and residual generation
+ *  Copyright (C) 2005 Nicolas Chetry <okin@altern.org>
+ *  and Edward Kelly <morph_2016@yahoo.co.uk>
+ *
+ *  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.
+ *  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
+ */
+
+#include "m_pd.h"
+#include <math.h>
+#define MAXPOLES 100
+
+static t_class *lpc_tilde_class;
+
+typedef struct _lpc_schur
+{
+  t_float *c_input, *c_residual;
+  /* just so we don't get clicks */
+  t_atom x_last_parcors[MAXPOLES];
+  t_atom x_parcors[MAXPOLES];
+} t_lpc_schur;
+
+typedef struct _lpc_tilde
+{
+  t_object x_obj;
+  t_float f_dummy;
+  t_float x_order, x_lastorder;
+  t_outlet *parcor_list;
+  t_lpc_schur x_schur;
+} t_lpc_tilde;
+
+t_int *lpc_tilde_perform(t_int *w)
+{
+  t_lpc_tilde     *x =     (t_lpc_tilde *)(w[1]);
+  t_lpc_schur *schur =     (t_lpc_schur *)(w[2]);
+  int              n =               (int)(w[3]);
+  t_float        *in = schur->c_input;
+  t_float       *res = schur->c_residual;
+//  t_float   *parcors = schur->PARCORS;
+//  t_float       *acf = schur->ACF;
+//  t_float         *k = schur->K;
+//  t_float         *p = schur->P;
+//  t_float         *r = schur->r;
+  t_int          ord = (int)x->x_order;
+  t_int        l_ord = (int)x->x_lastorder;
+//  t_float parcors[ord];
+  float acf[ord+1];
+  float k[ord+1];
+  float p[ord+1];
+  float r[ord+1];
+  float mem[ord];
+  int i, j, bid, y, z;
+  int g, h;
+  float tmp, temp, sav, di;
+  float parcor_1;  
+  for (i=0; i<ord; i++) 
+  {
+    SETFLOAT (&schur->x_parcors[i],0);
+    mem[i] = 0.0;
+  }
+  for (j=0; j<=ord; j++) 
+  {
+    acf[j] = 0;
+    for (i=j; i<n; i++) 
+	{
+	  acf[j] += in[i]*in[i-j];
+	}
+  }
+  if (acf[0] == 0) 
+  {
+    for (i=0; i<ord; i++)
+	{
+    SETFLOAT (&schur->x_parcors[i],0);
+	}
+  }
+  for (i=0; i<=ord; i++)
+  {
+    p[i]=acf[i];
+	if (i > 0 && i < ord)
+	{
+	  k[ord+1-i] = acf[i];
+	}
+  }
+  /* Schurr recursion */
+  for (y=1; y<=ord; y++)
+  {
+    if (p[0] < fabs (p[1]))
+	{
+	  for (i=y; i<=ord; i++)
+	  {
+	    r[i] = 0;
+	  }
+	  for (bid=1; bid <=ord; bid++)
+	  {
+            SETFLOAT (&schur->x_parcors[bid-1],r[bid]);
+	    //	    x->x_parcors[bid-1] = r[bid];
+	  }
+	}
+	r[y] = fabs(p[1])/p[0];
+	
+	if (p[1] >0)
+	{
+	  r[y] = -1.*r[y];
+	}
+	if (y==ord)
+	{
+	  for (bid=1; bid <=ord; bid++)
+	  {
+            SETFLOAT (&schur->x_parcors[bid-1],r[bid]);
+	    //	    x->x_parcors[bid-1] = r[bid];
+	  }
+	}
+	p[0] += p[1]*r[y];
+	
+	for (z=1; z <=ord-y; z++)
+	{
+	  p[z]        = p[z+1] + k[ord+1-z]*r[y];
+	  k[ord+1-z] += p[z+1] * r[y];
+	}
+  }
+  for (bid=1; bid <=ord; bid++)
+  {
+    SETFLOAT (&schur->x_parcors[bid-1],r[bid]);
+  }
+  parcor_1 = atom_getfloatarg(0,ord,schur->x_parcors); /* in order to avoid nil coefficients */
+  if (parcor_1 > 1e-5 || parcor_1 < -1e-5)
+    {
+      outlet_list(x->parcor_list,gensym("list"),ord,schur->x_parcors);
+
+  /* Analysis FIR lattice filtering */
+      for (g=0; g<n; g++)
+	{
+        
+    /* Analysis - Lattice structure */
+	  sav = di = in[g];
+	  for (i=0; i<ord; i++)
+	    {
+	      t_float parcor = atom_getfloatarg (i,ord,schur->x_parcors);
+	      SETFLOAT (&schur->x_last_parcors[i],parcor);
+	      x->x_lastorder = ord;
+	      temp = mem[i] + parcor*di;
+	      di += parcor*mem[i];
+	      mem[i] = sav;
+	      sav = temp;
+	    }
+	  res[g] = di;
+            
+	  }  /* next g */
+    }
+  else 
+    {
+      outlet_list(x->parcor_list,gensym("list"),l_ord,schur->x_last_parcors);
+      for (g=0; g<n; g++)
+	{
+	  res[g] = 0;
+	}
+    }
+  return(w+4);
+}
+
+void *lpc_tilde_dsp(t_lpc_tilde *x, t_signal **sp)
+{
+  x->x_schur.c_input = sp[0]->s_vec;
+  x->x_schur.c_residual = sp[1]->s_vec;
+  dsp_add(lpc_tilde_perform, 3, x, &x->x_schur, sp[0]->s_n);
+  return (void *)x;
+}
+
+void *lpc_tilde_new(t_floatarg f)
+{
+  t_lpc_tilde *x = (t_lpc_tilde *)pd_new(lpc_tilde_class);
+  x->x_order = f >= 1 ? (int)f : 5;
+  
+  floatinlet_new(&x->x_obj,&x->x_order);
+  outlet_new(&x->x_obj, &s_signal);
+  x->parcor_list = outlet_new(&x->x_obj, &s_list);
+  return (void *)x;
+}
+
+void lpc_tilde_setup(void)
+{
+  lpc_tilde_class = class_new(gensym("lpc~"), (t_newmethod)lpc_tilde_new, 0, sizeof(t_lpc_tilde), CLASS_DEFAULT, A_DEFFLOAT, 0);
+
+  post("\n. . Linear Predictive Coding. . . . . . . .");
+  post(". . PARCOR coefficients from input. . . . .");
+  post(". . by Nicolas Chetry <okin@altern.org> . .");
+  post(". & Edward Kelly <morph_2016@yahoo.co.uk> .");
+  
+  class_addmethod(lpc_tilde_class, (t_method)lpc_tilde_dsp, gensym("dsp"), 0);
+//  class_sethelpsymbol(lpc_tilde_class, gensym("help-lpc~"));
+  class_sethelpsymbol(lpc_tilde_class, gensym("lpc_test"));
+  CLASS_MAINSIGNALIN(lpc_tilde_class, t_lpc_tilde, f_dummy);
+}
diff --git a/lpc~/lpc_anal/makefile b/lpc~/lpc_anal/makefile
new file mode 100644
index 0000000..c8fce3f
--- /dev/null
+++ b/lpc~/lpc_anal/makefile
@@ -0,0 +1,105 @@
+current:
+	echo make pd_linux, pd_nt, pd_irix5, pd_irix6 or pd_darwin, then make install
+
+clean: ; rm -f *.pd_* *.o
+
+# ----------------------- NT -----------------------
+
+pd_nt: lpc~.dll
+
+INSTALL_PREFIX="C:\pd\extra"
+EXT=dll
+.SUFFIXES: .obj .dll
+
+PDNTCFLAGS = /W3 /WX /DNT /DPD /nologo
+VC="D:\Program Files\Microsoft Visual Studio\Vc98"
+
+PDNTINCLUDE = /I. /I\tcl\include /I..\..\src /I$(VC)\include
+
+PDNTLDIR = $(VC)\lib
+PDNTLIB = $(PDNTLDIR)\libc.lib \
+	$(PDNTLDIR)\oldnames.lib \
+	$(PDNTLDIR)\kernel32.lib \
+	..\..\bin\pd.lib 
+
+.c.dll:
+	cl $(PDNTCFLAGS) $(PDNTINCLUDE) /c $*.c
+	link /dll /export:$*_setup $*.obj $(PDNTLIB)
+
+# ----------------------- IRIX 5.x -----------------------
+
+pd_irix5: lpc~.pd_irix5
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_irix5
+.SUFFIXES: .pd_irix5
+
+SGICFLAGS5 = -o32 -DPD -DUNIX -DIRIX -O2
+
+SGIINCLUDE =  -I/usr/local/include
+
+.c.pd_irix5:
+	cc $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
+	ld -elf -shared -rdata_shared -o $*.pd_irix5 $*.o
+	rm $*.o
+
+# ----------------------- IRIX 5.x -----------------------
+
+pd_irix6: lpc~.pd_irix6
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_irix6
+.SUFFIXES: .pd_irix6
+
+SGICFLAGS5 = -o32 -DPD -DUNIX -DIRIX -O2
+
+SGIINCLUDE =  -I/usr/local/include
+
+.c.pd_irix6:
+	cc $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
+	ld -elf -shared -rdata_shared -o $*.pd_irix6 $*.o
+	rm $*.o
+
+# ----------------------- LINUX i386 -----------------------
+
+pd_linux: lpc~.pd_linux
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_linux
+.SUFFIXES: .pd_linux
+
+LINUXCFLAGS = -DPD -O2 -funroll-loops -fomit-frame-pointer \
+    -Wall -W -Wshadow -Wstrict-prototypes -Werror \
+    -Wno-unused -Wno-parentheses -Wno-switch
+
+LINUXINCLUDE =  -I/usr/local/include
+
+.c.pd_linux:
+	cc $(LINUXCFLAGS) $(LINUXINCLUDE) -o $*.o -c $*.c
+	ld -export_dynamic  -shared -o $*.pd_linux $*.o -lc -lm
+	strip --strip-unneeded $*.pd_linux
+	rm $*.o
+
+# ----------------------- Mac OSX -----------------------
+
+pd_darwin: lpc~.pd_darwin
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_darwin
+.SUFFIXES: .pd_darwin
+
+DARWINCFLAGS = -DPD -O2 -Wall -W -Wshadow -Wstrict-prototypes \
+    -Wno-unused -Wno-parentheses -Wno-switch
+
+.c.pd_darwin:
+	cc $(DARWINCFLAGS) $(LINUXINCLUDE) -o $*.o -c $*.c
+	cc -bundle -undefined suppress -flat_namespace -o $*.pd_darwin $*.o 
+	rm -f $*.o
+
+# ----------------------------------------------
+
+install::
+	install -d $(INSTALL_PREFIX)/lib/pd/extra
+#	install -m 644 *.$(EXT) $(INSTALL_PREFIX)/lib/pd/externs
+	-install -m 644 lpc~.$(EXT) $(INSTALL_PREFIX)/lib/pd/extra
+	install -m 644 *.pd $(INSTALL_PREFIX)/lib/pd/doc/5.reference
diff --git a/lpc~/lpc_filter/beauty.wav b/lpc~/lpc_filter/beauty.wav
new file mode 100644
index 0000000..689b25c
--- /dev/null
+++ b/lpc~/lpc_filter/beauty.wav
diff --git a/lpc~/lpc_filter/drummach.wav b/lpc~/lpc_filter/drummach.wav
new file mode 100644
index 0000000..cf8cd55
--- /dev/null
+++ b/lpc~/lpc_filter/drummach.wav
diff --git a/lpc~/lpc_filter/lpc-cross-synthesis.pd b/lpc~/lpc_filter/lpc-cross-synthesis.pd
new file mode 100644
index 0000000..e49ea4a
--- /dev/null
+++ b/lpc~/lpc_filter/lpc-cross-synthesis.pd
@@ -0,0 +1,327 @@
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+0 8 -225280 -62784 -90133 3409 1;
+#X floatatom 244 225 0 0 0 0 - - -;
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+#X obj 27 199 lpreson~;
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+#X obj 27 49 inlet~;
+#X obj 145 64 inlet;
+#X obj 202 34 inlet;
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+#X obj 99 135 hip~ 1000;
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+#X obj 316 54 inlet;
+#X obj 27 111 lpc~ 32;
+#X obj 27 152 *~ 1;
+#X obj 99 152 *~ 0;
+#X obj 202 51 sel 0 1;
+#X text 164 280 filter with larger block sizes;
+#X text 163 267 lpc~ produces a less glitchy;
+#X msg 202 68 1;
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+#X text 294 23 pre-emphasis/;
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+#X text 146 48 order;
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+#X obj 28 284 *~;
+#X obj 142 221 tabreceive~ hanning;
+#X text 151 296 overlapping windows are essential;
+#X text 151 308 otherwise clicks will result;
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+0.00684595 0.00634929 0.00587122;
+#A 1000 0.00541175 0.00497089 0.00454868 0.00414512 0.00376023 0.00339403
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+0.000235291 0.000150591 8.47091e-05 3.76491e-05 9.41236e-06;
+#X coords 0 1 1023 0 100 70 1;
+#X restore 478 154 graph;
+#X connect 0 0 1 0;
+#X connect 1 0 3 4;
+#X connect 3 0 2 0;
+#X connect 3 0 2 1;
+#X connect 6 0 13 0;
+#X connect 7 0 13 1;
+#X connect 8 0 3 0;
+#X connect 8 1 3 1;
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+#X connect 10 0 3 2;
+#X connect 11 0 3 3;
+#X connect 12 0 8 1;
+#X connect 13 0 8 2;
+#X connect 13 1 8 3;
+#X connect 15 0 10 0;
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+#X connect 17 0 18 0;
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+#X connect 25 0 0 0;
+#X connect 26 0 25 0;
+#X connect 30 0 17 0;
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diff --git a/lpc~/lpc_filter/lpc_test.pd b/lpc~/lpc_filter/lpc_test.pd
new file mode 100644
index 0000000..7c9faea
--- /dev/null
+++ b/lpc~/lpc_filter/lpc_test.pd
@@ -0,0 +1,53 @@
+#N canvas 0 0 917 300 10;
+#X obj 185 160 lpc~ 10;
+#N canvas 0 0 450 300 playsound 0;
+#X obj 68 74 inlet;
+#X obj 163 76 inlet;
+#X obj 163 93 openpanel;
+#X msg 163 110 read -resize \$1 testfile;
+#X obj 26 91 tabplay~ testfile;
+#X obj 163 127 soundfiler;
+#X obj 163 144 / 44.1;
+#X obj 163 161 outlet;
+#X obj 26 108 outlet~;
+#X obj 99 149 outlet;
+#X connect 0 0 4 0;
+#X connect 0 0 9 0;
+#X connect 1 0 2 0;
+#X connect 2 0 3 0;
+#X connect 3 0 5 0;
+#X connect 4 0 8 0;
+#X connect 5 0 6 0;
+#X connect 6 0 7 0;
+#X restore 185 119 pd playsound;
+#N canvas 0 0 450 300 graph1 0;
+#X array testfile 1.7683e+06 float 0;
+#X coords 0 1 1.7683e+06 -1 200 140 1;
+#X restore 516 19 graph;
+#X obj 264 104 bng 15 250 50 0 empty empty load 0 -6 0 8 -262144 -1
+-1;
+#X obj 185 104 bng 15 250 50 0 empty empty play 0 -6 0 8 -262144 -1
+-1;
+#X obj 134 118 metro;
+#X obj 134 103 tgl 15 0 empty empty loop 0 -6 0 8 -262144 -1 -1 0 1
+;
+#X obj 185 230 dac~;
+#X obj 329 37 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0 1
+;
+#X msg 329 68 \; pd dsp \$1;
+#X floatatom 242 142 5 1 100 0 poles - -;
+#X obj 184 183 lpreson~;
+#X obj 185 206 hip~ 18;
+#X connect 0 0 11 0;
+#X connect 0 1 11 0;
+#X connect 1 0 0 0;
+#X connect 1 2 5 1;
+#X connect 3 0 1 1;
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diff --git a/lpc~/lpc_filter/lpreson~.c b/lpc~/lpc_filter/lpreson~.c
new file mode 100644
index 0000000..c89a8e5
--- /dev/null
+++ b/lpc~/lpc_filter/lpreson~.c
@@ -0,0 +1,131 @@
+/*  Lattice IIR filter from PARCOR coefficients
+ *  Copyright (C) 2005 Nicolas Chetry <okin@altern.org>
+ *  and Edward Kelly <morph_2016@yahoo.co.uk>
+ *
+ *  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.
+ *  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
+ */
+
+#include "m_pd.h"
+
+static t_class *lpreson_tilde_class;
+
+typedef struct _lpreson_control
+{
+  t_float *c_residual, *c_output;
+  t_atom *x_parcors;
+  /*  t_atom x_parc_interp_one[MAXPOLES];
+  t_int x_parc_ord_one;
+  t_atom x_parc_interp_two[MAXPOLES];
+  t_int x_parc_ord_two; */
+} t_lpreson_control;
+
+typedef struct _lpreson_tilde
+{
+  t_object x_obj;
+  t_float f_dummy;
+  t_int x_order;
+  t_lpreson_control x_ctl;
+} t_lpreson_tilde;
+
+t_int *lpreson_tilde_perform(t_int *w)
+{
+  t_object x_obj;
+  t_lpreson_tilde     *x =     (t_lpreson_tilde *)(w[1]);
+  t_lpreson_control *ctl =   (t_lpreson_control *)(w[2]);
+  int                  n =                   (int)(w[3]);
+  t_float            *in = ctl->c_residual;
+  t_float           *out = ctl->c_output;
+  t_int              ord = x->x_order;
+  float mem[ord+1];
+/* 
+ *  Do the inverse filtering 
+ *  
+ *  'data_in'     : residual signal (length 'len')
+ *  'data_out'    : output frame (length 'len')
+ *  'coeff'       : the parcor coefficients (length 'tap')
+ *  'lattice_iir' : filter memory - Previously initialised using init_lattice_iir_filter()
+ *
+ */  
+  int k, i;
+  float sri;
+
+  for (i=0;i<=ord;i++)
+  {
+    //    SETFLOAT (&schur->x_parcors[i],0);
+    mem[i] = 0.0;
+  }
+  
+  for (k = 0; k < n; k++ ) 
+  {
+    /* Synthesis filter - Lattice structure */
+    sri  = in[k];
+    for (i=0; i<ord; i++)
+    {
+      t_float parcor = atom_getfloatarg ((ord-1-i),ord,ctl->x_parcors);          
+      sri =  sri -  parcor * mem[ord-1-i];
+      mem[ord-i] = mem[ord-1-i] + parcor*sri;
+    }
+    out[k] = sri;
+    mem[0] = sri;
+            
+  } /* next k */
+  return(w+4);          
+}
+
+static void lpreson_tilde_list(t_lpreson_tilde *x, t_symbol *s, int argc, t_atom *argv)
+{
+  if (argc) 
+  {
+    //    x->x_ctl.parc_interp_two = copybytes(x->x_ctl.parc_interp_one, x->x_ctl.parc_ord_one * sizeof(t_atom));
+    //    x->x_ctl.parc_ord_two = x->x_ctl.parc_ord_one;
+    //    x->x_ctl.parc_interp_one = copybytes(x->x_ctl.parcors, x->x_order * sizeof(t_atom));
+    //    x->x_ctl.parc_ord_one = x->x_order;
+    freebytes(x->x_ctl.x_parcors, x->x_order * sizeof(t_atom));
+  }
+
+  x->x_ctl.x_parcors = copybytes(argv, argc * sizeof(t_atom));
+  x->x_order = argc;
+}
+
+void *lpreson_tilde_dsp(t_lpreson_tilde *x, t_signal **sp)
+{
+  x->x_ctl.c_residual = sp[0]->s_vec;
+  x->x_ctl.c_output = sp[1]->s_vec;
+  dsp_add(lpreson_tilde_perform, 3, x, &x->x_ctl, sp[0]->s_n);
+  return (void *)x;
+}
+
+void *lpreson_tilde_new(t_floatarg f)
+{
+  t_lpreson_tilde *x = (t_lpreson_tilde *)pd_new(lpreson_tilde_class);
+  x->x_order = f >= 1 ? (int)f : 5;
+  
+  outlet_new(&x->x_obj, &s_signal);
+  return (void *)x;
+}
+
+void lpreson_tilde_setup(void)
+{
+  lpreson_tilde_class = class_new(gensym("lpreson~"), (t_newmethod)lpreson_tilde_new, 0, sizeof(t_lpreson_tilde), CLASS_DEFAULT, A_DEFFLOAT, 0);
+
+  post(". . Lattice IIR filter for lpc. . . . . . .");
+  post(". . by Nicolas Chetry <okin@altern.org> . .");
+  post(". & Edward Kelly <morph_2016@yahoo.co.uk> .");
+  
+  class_addmethod(lpreson_tilde_class, (t_method)lpreson_tilde_dsp, gensym("dsp"), 0);
+//  class_sethelpsymbol(lpreson_tilde_class, gensym("help-lpc~"));
+  class_addlist(lpreson_tilde_class, lpreson_tilde_list);
+  class_sethelpsymbol(lpreson_tilde_class, gensym("lpc-cross-synthesis.pd"));
+  CLASS_MAINSIGNALIN(lpreson_tilde_class, t_lpreson_tilde, f_dummy);
+}
diff --git a/lpc~/lpc_filter/makefile b/lpc~/lpc_filter/makefile
new file mode 100644
index 0000000..23840c6
--- /dev/null
+++ b/lpc~/lpc_filter/makefile
@@ -0,0 +1,106 @@
+current:
+	echo make pd_linux, pd_nt, pd_irix5, pd_irix6 or pd_darwin, then make install
+
+clean: ; rm -f *.pd_* *.o
+
+# ----------------------- NT -----------------------
+
+pd_nt: lpreson~.dll
+
+INSTALL_PREFIX="C:\pd\extra"
+EXT=dll
+.SUFFIXES: .obj .dll
+
+PDNTCFLAGS = /W3 /WX /DNT /DPD /nologo
+VC="D:\Program Files\Microsoft Visual Studio\Vc98"
+
+PDNTINCLUDE = /I. /I\tcl\include /I..\..\src /I$(VC)\include
+
+PDNTLDIR = $(VC)\lib
+PDNTLIB = $(PDNTLDIR)\libc.lib \
+	$(PDNTLDIR)\oldnames.lib \
+	$(PDNTLDIR)\kernel32.lib \
+	..\..\bin\pd.lib 
+
+.c.dll:
+	cl $(PDNTCFLAGS) $(PDNTINCLUDE) /c $*.c
+	link /dll /export:$*_setup $*.obj $(PDNTLIB)
+
+# ----------------------- IRIX 5.x -----------------------
+
+pd_irix5: lpreson~.pd_irix5
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_irix5
+.SUFFIXES: .pd_irix5
+
+SGICFLAGS5 = -o32 -DPD -DUNIX -DIRIX -O2
+
+SGIINCLUDE =  -I/usr/local/include
+
+.c.pd_irix5:
+	cc $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
+	ld -elf -shared -rdata_shared -o $*.pd_irix5 $*.o
+	rm $*.o
+
+# ----------------------- IRIX 5.x -----------------------
+
+pd_irix6: lpreson~.pd_irix6
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_irix6
+.SUFFIXES: .pd_irix6
+
+SGICFLAGS5 = -o32 -DPD -DUNIX -DIRIX -O2
+
+SGIINCLUDE =  -I/usr/local/include
+
+.c.pd_irix6:
+	cc $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
+	ld -elf -shared -rdata_shared -o $*.pd_irix6 $*.o
+	rm $*.o
+
+# ----------------------- LINUX i386 -----------------------
+
+pd_linux: lpreson~.pd_linux
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_linux
+.SUFFIXES: .pd_linux
+
+LINUXCFLAGS = -DPD -O2 -funroll-loops -fomit-frame-pointer \
+    -Wall -W -Wshadow -Wstrict-prototypes -Werror \
+    -Wno-unused -Wno-parentheses -Wno-switch
+
+LINUXINCLUDE =  -I/usr/local/include
+
+.c.pd_linux:
+	cc $(LINUXCFLAGS) $(LINUXINCLUDE) -o $*.o -c $*.c
+	ld -export_dynamic  -shared -o $*.pd_linux $*.o -lc -lm
+	strip --strip-unneeded $*.pd_linux
+	rm $*.o
+
+# ----------------------- Mac OSX -----------------------
+
+pd_darwin: lpreson~.pd_darwin
+
+INSTALL_PREFIX=/usr/local
+EXT=pd_darwin
+.SUFFIXES: .pd_darwin
+
+DARWINCFLAGS = -DPD -O2 -Wall -W -Wshadow -Wstrict-prototypes \
+    -Wno-unused -Wno-parentheses -Wno-switch
+
+.c.pd_darwin:
+	cc $(DARWINCFLAGS) $(LINUXINCLUDE) -o $*.o -c $*.c
+	cc -bundle -undefined suppress -flat_namespace -o $*.pd_darwin $*.o 
+	rm -f $*.o
+
+# ----------------------------------------------
+
+install::
+	install -d $(INSTALL_PREFIX)/lib/pd/extra
+#	install -m 644 *.$(EXT) $(INSTALL_PREFIX)/lib/pd/externs
+	-install -m 644 lpreson~.$(EXT) $(INSTALL_PREFIX)/lib/pd/extra
+	install -m 644 *.pd $(INSTALL_PREFIX)/lib/pd/doc/5.reference
+	install -m 644 *.wav $(INSTALL_PREFIX)/lib/pd/doc/5.reference