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-rw-r--r--wahwah~/CHANGES.LOG2
-rw-r--r--wahwah~/COPYING280
-rw-r--r--wahwah~/INSTALL15
-rw-r--r--wahwah~/Makefile82
-rw-r--r--wahwah~/README24
-rw-r--r--wahwah~/help-wahwah~.pd48
-rw-r--r--wahwah~/rs-wahwah~.pd348
-rw-r--r--wahwah~/wahwah~.c409
8 files changed, 1208 insertions, 0 deletions
diff --git a/wahwah~/CHANGES.LOG b/wahwah~/CHANGES.LOG
new file mode 100644
index 0000000..dca0aa9
--- /dev/null
+++ b/wahwah~/CHANGES.LOG
@@ -0,0 +1,2 @@
+0.1
+ initial wahwah~ implementation
diff --git a/wahwah~/COPYING b/wahwah~/COPYING
new file mode 100644
index 0000000..2128a66
--- /dev/null
+++ b/wahwah~/COPYING
@@ -0,0 +1,280 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+ Finally, any free program is threatened constantly by software
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+ The precise terms and conditions for copying, distribution and
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+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
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+Activities other than copying, distribution and modification are not
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+running the Program is not restricted, and the output from the Program
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+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
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+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
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+ 2. You may modify your copy or copies of the Program or any portion
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+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
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+
+ c) If the modified program normally reads commands interactively
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+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
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+Thus, it is not the intent of this section to claim rights or contest
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+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
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+
+ 3. You may copy and distribute the Program (or a work based on it,
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+
+ a) Accompany it with the complete corresponding machine-readable
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+The source code for a work means the preferred form of the work for
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+
+ 4. You may not copy, modify, sublicense, or distribute the Program
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+void, and will automatically terminate your rights under this License.
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+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
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+ 5. You are not required to accept this License, since you have not
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+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
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+Program), you indicate your acceptance of this License to do so, and
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+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
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+original licensor to copy, distribute or modify the Program subject to
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+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
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+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
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+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
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+to distribute software through any other system and a licensee cannot
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+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission. For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
diff --git a/wahwah~/INSTALL b/wahwah~/INSTALL
new file mode 100644
index 0000000..62ca7df
--- /dev/null
+++ b/wahwah~/INSTALL
@@ -0,0 +1,15 @@
+untar in /my/pd/dir/externs
+
+cd /my/pd/dir/externs/wahwah~
+
+make clean
+
+make
+
+make install
+
+open help-wahwah~.pd
+
+Thanx for getting here.
+Yves/
+comments and bugs @ ydegoyon@free.fr
diff --git a/wahwah~/Makefile b/wahwah~/Makefile
new file mode 100644
index 0000000..0a2837d
--- /dev/null
+++ b/wahwah~/Makefile
@@ -0,0 +1,82 @@
+NAME=wahwah~
+CSYM=wahwah~
+
+current: pd_linux
+
+# ----------------------- NT -----------------------
+
+pd_nt: $(NAME).dll
+
+.SUFFIXES: .dll
+
+PDNTCFLAGS = /W3 /WX /DNT /DPD /nologo
+VC="C:\Program Files\Microsoft Visual Studio\Vc98"
+
+PDNTINCLUDE = /I. /I\tcl\include /I\ftp\pd\src /I$(VC)\include
+
+PDNTLDIR = $(VC)\lib
+PDNTLIB = $(PDNTLDIR)\libc.lib \
+ $(PDNTLDIR)\oldnames.lib \
+ $(PDNTLDIR)\kernel32.lib \
+ \ftp\pd\bin\pd.lib
+
+.c.dll:
+ cl $(PDNTCFLAGS) $(PDNTINCLUDE) /c $*.c
+ link /dll /export:$(CSYM)_setup $*.obj $(PDNTLIB)
+
+# ----------------------- IRIX 5.x -----------------------
+
+pd_irix5: $(NAME).pd_irix5
+
+.SUFFIXES: .pd_irix5
+
+SGICFLAGS5 = -o32 -DPD -DUNIX -DIRIX -O2
+
+SGIINCLUDE = -I../../src
+
+.c.pd_irix5:
+ cc $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
+ ld -elf -shared -rdata_shared -o $*.pd_irix5 $*.o
+ rm $*.o
+
+# ----------------------- IRIX 6.x -----------------------
+
+pd_irix6: $(NAME).pd_irix6
+
+.SUFFIXES: .pd_irix6
+
+SGICFLAGS6 = -n32 -DPD -DUNIX -DIRIX -DN32 -woff 1080,1064,1185 \
+ -OPT:roundoff=3 -OPT:IEEE_arithmetic=3 -OPT:cray_ivdep=true \
+ -Ofast=ip32
+
+.c.pd_irix6:
+ cc $(SGICFLAGS6) $(SGIINCLUDE) -o $*.o -c $*.c
+ ld -n32 -IPA -shared -rdata_shared -o $*.pd_irix6 $*.o
+ rm $*.o
+
+# ----------------------- LINUX i386 -----------------------
+
+pd_linux: $(NAME).pd_linux
+
+.SUFFIXES: .pd_linux
+
+LINUXCFLAGS = -DPD -DUNIX -DICECAST -O2 -funroll-loops -fomit-frame-pointer \
+ -Wall -W -Wno-shadow -Wstrict-prototypes \
+ -Wno-unused -Wno-parentheses -Wno-switch #-Werror
+
+LINUXINCLUDE = -I../../src
+
+.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 -f $*.o ../$*.pd_linux
+ ln -s $*/$*.pd_linux ..
+
+# ----------------------------------------------------------
+
+install:
+ cp help-*.pd rs-*.pd ../../doc/5.reference
+
+clean:
+ rm -f *.o *.pd_* so_locations
diff --git a/wahwah~/README b/wahwah~/README
new file mode 100644
index 0000000..6565787
--- /dev/null
+++ b/wahwah~/README
@@ -0,0 +1,24 @@
+Version 0.01
+copyleft 2002 by Yves Degoyon.
+
+tarballs and updates available @ http://ydegoyon.free.fr
+
+wahwah~ : a kind of effect used in psychedelic music, use it elsewhere
+
+the algorithm was taken from Digital Effects,
+a guitar effects software for DOS which rocks, written by Alexey Smoli
+( http://st.karelia.ru/~smlalx/ )
+
+To install wahwah~, follow the steps from INSTALL
+
+This software is published under GPL terms, see COPYING
+for rights restrictions.
+
+This is software with ABSOLUTELY NO WARRANTY.
+Use it at your OWN RISK. It's possible to damage e.g. hardware or your hearing
+due to a bug or for other reasons.
+We do not warrant that the program is free of infringement of any third-party
+patents.
+
+*****************************************************************************
+
diff --git a/wahwah~/help-wahwah~.pd b/wahwah~/help-wahwah~.pd
new file mode 100644
index 0000000..8afeb3c
--- /dev/null
+++ b/wahwah~/help-wahwah~.pd
@@ -0,0 +1,48 @@
+#N canvas 45 57 817 573 10;
+#X text 319 534 comments & bugs @ ydegoyon.free.fr;
+#X text 431 111 Wahwah~ : used in psychedelic music;
+#X obj 144 411 dac~;
+#X obj 148 377 rs-wahwah~;
+#X msg 94 62 bang;
+#X obj 93 84 openpanel;
+#X obj 93 104 t s b;
+#X obj 150 106 float \$0;
+#X text 101 39 Step 1 : Load a sound file;
+#X obj 93 127 route float;
+#X obj 94 219 soundfiler;
+#X text 151 55 ( maybe \, a guitar sound ? );
+#X obj 93 150 makefilename %d-sample;
+#X obj 582 374 table \$0-sample;
+#X msg 94 197 read -resize \$1 \$2;
+#X obj 95 176 pack s s;
+#X msg 146 307 bang;
+#X text 191 307 Step 2 : Start playing;
+#X obj 59 288 adc~;
+#X text 229 379 Step 3 : Modify parameters;
+#X text 487 483 ( http://st.karelia.ru/~smlalx );
+#X text 320 470 a DOS guitar effects software that rocks;
+#X text 321 484 written by Alexei Smoli;
+#X obj 606 263 loadbang;
+#X msg 608 293 \; pd dsp 1;
+#X text 319 456 the algorithm is borrowed from Digital Effects \,;
+#X obj 146 354 tabplay~ \$0-sample;
+#X text 35 266 Plug a guitar ??;
+#X msg 228 330 stop;
+#X obj 146 330 metro 250;
+#X connect 3 0 2 0;
+#X connect 3 0 2 1;
+#X connect 4 0 5 0;
+#X connect 5 0 6 0;
+#X connect 6 0 15 0;
+#X connect 6 1 7 0;
+#X connect 7 0 9 0;
+#X connect 9 0 12 0;
+#X connect 12 0 15 1;
+#X connect 14 0 10 0;
+#X connect 15 0 14 0;
+#X connect 16 0 29 0;
+#X connect 18 0 3 0;
+#X connect 23 0 24 0;
+#X connect 26 0 3 0;
+#X connect 28 0 29 0;
+#X connect 29 0 26 0;
diff --git a/wahwah~/rs-wahwah~.pd b/wahwah~/rs-wahwah~.pd
new file mode 100644
index 0000000..af5c256
--- /dev/null
+++ b/wahwah~/rs-wahwah~.pd
@@ -0,0 +1,348 @@
+#N canvas 97 16 837 658 10;
+#X obj 87 469 outlet~;
+#X msg 149 24 preset 1;
+#X msg 149 46 preset 2;
+#X msg 149 71 preset 3;
+#X msg 149 95 preset 4;
+#X msg 149 118 preset 5;
+#X text 216 25 fast change medium wah-wah;
+#X text 217 46 slow change medium wah-wah;
+#X text 219 71 fast wah-wah;
+#X text 219 94 ranged wah-wah;
+#X obj 53 307 inlet~;
+#X text 220 117 wah-wah 400/2000 Hz;
+#X obj 177 468 tabwrite~ owahwah;
+#N canvas 0 0 450 300 graph1 0;
+#X array owahwah 2000 float 1;
+#A 0 -0.039093 -0.0409546 -0.0498657 -0.0647583 -0.0871887 -0.115601
+-0.149658 -0.186188 -0.222839 -0.259918 -0.295898 -0.328308 -0.356567
+-0.380859 -0.399689 -0.412933 -0.419983 -0.419434 -0.410675 -0.392517
+-0.365753 -0.331726 -0.29129 -0.245361 -0.196503 -0.148499 -0.103546
+-0.0623779 -0.0287476 -0.00424194 0.00881958 0.0116577 0.00469971 -0.0116577
+-0.0361023 -0.0664978 -0.100555 -0.136414 -0.172302 -0.205841 -0.235596
+-0.261932 -0.283508 -0.299713 -0.311584 -0.318848 -0.321991 -0.322968
+-0.322998 -0.322662 -0.321503 -0.321228 -0.321503 -0.321747 -0.322876
+-0.323883 -0.324463 -0.324066 -0.320892 -0.31308 -0.299133 -0.277191
+-0.244019 -0.198334 -0.139526 -0.0670471 0.0205078 0.121002 0.230194
+0.344482 0.460846 0.573944 0.677521 0.765656 0.833282 0.876801 0.893036
+0.882629 0.846802 0.78891 0.714539 0.629425 0.539551 0.452789 0.374146
+0.307892 0.257263 0.222931 0.204132 0.19812 0.20163 0.210175 0.21933
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+-0.00134277 -0.0376587 -0.0657654 -0.0814819 -0.0820007 -0.0656738
+-0.0337219 0.0140381 0.0779724 0.156006 0.245911 0.346008 0.452057
+0.559235 0.663025 0.757202 0.837769 0.896179 0.925873 0.922516 0.882751
+0.806122 0.694183 0.55191 0.387329 0.210052 0.0307922 -0.138519 -0.286224
+-0.401611 -0.480316 -0.519104 -0.516846 -0.47644 -0.40213 -0.299652
+-0.175842 -0.0374451 0.108887 0.257507 0.401276 0.536102 0.658722 0.767181
+0.857239 0.927002 0.974548 0.99762 0.995697 0.969116 0.919312 0.852112
+0.772278 0.684723 0.5961 0.511749 0.437042 0.374969 0.326416 0.289948
+0.260529 0.233032 0.201965 0.157501 0.0927124 0.00149536 -0.120087
+-0.272583 -0.452911 -0.653748 -0.863739 -1 -1 -1 -1 -1 -1 -1 -1 -1
+-0.973389 -0.805054 -0.654327 -0.533722 -0.449554 -0.403442 -0.390808
+-0.404175 -0.431488 -0.458344 -0.471954 -0.461639 -0.419342 -0.340942
+-0.226868 -0.0821228 0.0829468 0.257294 0.426544 0.577087 0.695618
+0.771759 0.798157 0.771332 0.692352 0.566376 0.402252 0.209686 -0.00247192
+-0.22171 -0.43985 -0.650452 -0.847473 -1 -1 -1 -1 -1 -1 -1 -1 -1 -0.739136
+-0.431183 -0.0951538 0.245636 0.56543 0.838531 0.999969 0.999969 0.999969
+0.999969 0.999969 0.802216 0.559937 0.29715 0.0325623 -0.217773 -0.442688
+-0.636414 -0.795715 -0.92099 -1 -1 -1 -1 -1 -1 -1 -0.950989 -0.852966
+-0.744476 -0.634064 -0.530029 -0.443756 -0.384125 -0.356415 -0.362183
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+-0.592346 -0.640137 -0.651886 -0.610596 -0.502045 -0.315704 -0.0520325
+0.280945 0.666718 0.999969;
+#X coords 0 2 1999 -2 200 140 1;
+#X restore 596 461 graph;
+#X msg 177 446 bang;
+#X obj 602 315 hsl 128 15 0 100 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 1270 0;
+#X text 607 295 The pedal (step);
+#X obj 601 216 f;
+#X obj 632 216 + 1;
+#X msg 599 158 bang;
+#X obj 645 242 > 100;
+#X obj 688 241 route 1;
+#X msg 685 215 -1;
+#X msg 559 216 0;
+#X obj 693 185 route 1;
+#X obj 664 186 < 0;
+#X msg 690 159 1;
+#X msg 555 160 stop;
+#X obj 161 187 hsl 128 15 0 3000 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 5600 0;
+#X text 162 166 Minimum freq [ 0 - 3000 ];
+#X obj 212 221 hsl 128 15 0 3000 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 3300 0;
+#X text 207 205 Maximum freq [ 0 - 3000 ];
+#X obj 237 259 hsl 128 15 0 1000 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 4200 0;
+#X text 234 241 Sensibility [ 0 - 1000 ];
+#X obj 285 292 hsl 128 15 0 100 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 1100 0;
+#X text 280 275 Maxstep [ 0 - 100 ];
+#X obj 340 327 hsl 128 15 -15 15 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 12400 0;
+#X text 335 310 Gain [ -15 - 15 ];
+#X obj 408 369 hsl 128 15 0 10 0 0 empty empty empty 20 8 0 8 -262144
+-1 -1 5000 0;
+#X text 403 351 Bandwidth [ 0 - 10 ];
+#X text 597 126 Auto;
+#X text 164 148 Note : setting a parameter overrides presets;
+#X obj 87 414 wahwah~ --------------------------------------------------
+;
+#X text 133 543 Note : interesting to set bandwith close to 10;
+#X obj 600 185 metro 10;
+#X obj 648 127 loadbang;
+#X connect 1 0 42 0;
+#X connect 2 0 42 0;
+#X connect 3 0 42 0;
+#X connect 4 0 42 0;
+#X connect 5 0 42 0;
+#X connect 10 0 42 0;
+#X connect 14 0 12 0;
+#X connect 15 0 42 7;
+#X connect 17 0 18 0;
+#X connect 17 0 20 0;
+#X connect 17 0 25 0;
+#X connect 17 0 15 0;
+#X connect 18 0 17 1;
+#X connect 19 0 44 0;
+#X connect 20 0 21 0;
+#X connect 21 0 22 0;
+#X connect 22 0 18 1;
+#X connect 23 0 17 0;
+#X connect 24 0 26 0;
+#X connect 25 0 24 0;
+#X connect 26 0 18 1;
+#X connect 27 0 44 0;
+#X connect 28 0 42 1;
+#X connect 30 0 42 2;
+#X connect 32 0 42 3;
+#X connect 34 0 42 4;
+#X connect 36 0 42 5;
+#X connect 38 0 42 6;
+#X connect 42 0 0 0;
+#X connect 42 0 12 0;
+#X connect 44 0 17 0;
+#X connect 45 0 19 0;
diff --git a/wahwah~/wahwah~.c b/wahwah~/wahwah~.c
new file mode 100644
index 0000000..72c77d4
--- /dev/null
+++ b/wahwah~/wahwah~.c
@@ -0,0 +1,409 @@
+/* Copyright (c) 2002 Yves Degoyon. */
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL */
+/* WARRANTIES, see the file, "COPYING" in this distribution. */
+/* */
+/* wahwah~ -- a kind of effect used in psychedelic music */
+/* the algorithm was taken from Digital Effects, */
+/* a guitar effects software for DOS which rocks, written by Alexey Smoli */
+/* ( http://st.karelia.ru/~smlalx/ ) */
+/* */
+/* 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. */
+/* */
+/* See file LICENSE for further informations on licensing terms. */
+/* */
+/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+/* */
+/* Based on PureData by Miller Puckette and others. */
+/* */
+/* Made while listening to : */
+/* */
+/* Crass -- "Shaved Women ( Collaborators )" */
+/* Zounds -- "Can't Cheat Karma" */
+/* */
+/* Special message for the french : */
+/* "Delay all your work...and go vote against national front" */
+/* ---------------------------------------------------------------------------- */
+
+#include "m_pd.h"
+#include <stdlib.h>
+#include <math.h>
+
+#ifdef NT
+#define M_PI 3.14159265358979323846
+#endif
+
+#define BFSZ 4096 /* main delay buffer */
+#define BLOCK_DELAY 10 /* number of blocks to delay */
+#define NA 0.0 /* param not applicable */
+#define COEFFSIZE 3000 /* coefficients size */
+#define NBCOEFFS 5 /* number of coefficients */
+
+static char *wahwah_version = "wahwah~: an audio wahwah, version 0.1 (ydegoyon@free.fr)";
+
+typedef struct _wahwah
+{
+ t_object x_obj;
+ double *x_buf;
+ t_int x_samplerate;
+ t_float *x_coeffs;
+ double x_minfc; /* min frequency Hz */ /* 0< <3000 */
+ double x_maxfc; /* max frequency Hz */ /* 0< <3000 */
+ double x_sense; /* increase/decrease frequency change by one mouse movement Hz */ /* 0< <=1000 */
+ double x_maxstep; /* maximum frequency change step KHz */ /* 0< <=100 */
+ double x_dbgain; /* peaking filter gain dB */ /* -15<= <=15 */
+ double x_bandwidth; /* bandwidth in octaves (between midpoint (dBgain/2)
+ gain frequencies) or */ /* 0< <10 */
+ double x_Q; /* the EE kinda definition */ /* 0< <=1 */
+
+ /* variables for audio computation */
+ double min_coef,max_coef,cur_coef,step,maxstep;
+ t_int down;
+ /* amplitudes */
+ short x0,x1,x2;
+ t_int y0,y1,y2;
+
+ t_float x_f;
+} t_wahwah;
+
+static t_class *wahwah_class;
+
+static void wahwah_set_coeffs (t_wahwah *x)
+{
+ t_int i;
+ double omega;
+ double sn,cs;
+ double alpha = 0.0;
+ /* filter coefficients */
+ double a0,a1,a2,b0,b1,b2;
+ double A;
+
+ A = exp(x->x_dbgain/40.0)*log(10.0);
+ for (i = 0; i < COEFFSIZE; i++)
+ {
+ omega = 2.0*M_PI*(double)i/(double)x->x_samplerate;
+ sn = sin(omega);
+ cs = cos(omega);
+ if (x->x_bandwidth)
+ alpha = sn*sin(log(2.0)/2.0*x->x_bandwidth*omega/sn);
+ else
+ /* if Q is specified instead of bandwidth */
+ if (x->x_Q)
+ alpha = sn/(2.0*x->x_Q);
+
+ /* then compute the coefs for whichever filter type you want */
+ b0 = 1.0 + alpha*A;
+ b1 = -2.0*cs ;
+ b2 = 1.0 - alpha*A;
+ a0 = 1.0 + alpha/A;
+ a1 = -2.0*cs ;
+ a2 = 1.0 - alpha/A;
+
+ *(x->x_coeffs+i*NBCOEFFS) = (b0/a0);
+ *(x->x_coeffs+i*NBCOEFFS+1) = (b1/a0);
+ *(x->x_coeffs+i*NBCOEFFS+2) = (b2/a0);
+ *(x->x_coeffs+i*NBCOEFFS+3) = (a1/a0);
+ *(x->x_coeffs+i*NBCOEFFS+4) = (a2/a0);
+ // post( "wahwah~ : coeff : %f", *(x->x_coeffs+i*NBCOEFFS+4) );
+ }
+ x->min_coef = x->x_minfc;
+ x->max_coef = x->x_maxfc;
+ x->cur_coef = x->min_coef;
+ x->down = 1;
+ x->step = 0;
+ x->maxstep = x->x_maxstep/(double)x->x_samplerate*1000.0;
+}
+
+static void wahwah_bandwidth(t_wahwah *x, t_floatarg fbandwidth )
+{
+ if ( fbandwidth > 10.0 )
+ {
+ fbandwidth = 10.0;
+ }
+ if ( fbandwidth < 0.0 )
+ {
+ fbandwidth = 0.0;
+ }
+ x->x_bandwidth = fbandwidth;
+ // post( "wahwah~ : bandwidth: %f", x->x_bandwidth );
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_dbgain(t_wahwah *x, t_floatarg fdbgain )
+{
+ if ( fdbgain > 15.0 )
+ {
+ fdbgain = 15.0;
+ }
+ if ( fdbgain < -15.0 )
+ {
+ fdbgain = -15.0;
+ }
+ x->x_dbgain = fdbgain;
+ // post( "wahwah~ : dbgain: %f", x->x_dbgain );
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_maxstep(t_wahwah *x, t_floatarg fmaxstep )
+{
+ if ( fmaxstep > 100.0 )
+ {
+ fmaxstep = 100.0;
+ }
+ if ( fmaxstep < 0.0 )
+ {
+ fmaxstep = 0.0;
+ }
+ x->x_maxstep = fmaxstep;
+ // post( "wahwah~ : maxstep: %f", x->x_maxstep );
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_sensibility(t_wahwah *x, t_floatarg fsensibility )
+{
+ if ( fsensibility > 1000.0 )
+ {
+ fsensibility = 1000.0;
+ }
+ if ( fsensibility < 0.0 )
+ {
+ fsensibility = 0.0;
+ }
+ x->x_sense = fsensibility;
+ // post( "wahwah~ : sensibility: %f", x->x_sense );
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_maxfreq(t_wahwah *x, t_floatarg fmaxfreq )
+{
+ if ( fmaxfreq > 3000.0 )
+ {
+ fmaxfreq = 3000.0;
+ }
+ if ( fmaxfreq < 0.0 )
+ {
+ fmaxfreq = 0.0;
+ }
+ x->x_maxfc = fmaxfreq;
+ // post( "wahwah~ : maxfreq: %f", x->x_maxfc );
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_minfreq(t_wahwah *x, t_floatarg fminfreq )
+{
+ if ( fminfreq > 3000.0 )
+ {
+ fminfreq = 3000.0;
+ }
+ if ( fminfreq < 0.0 )
+ {
+ fminfreq = 0.0;
+ }
+ x->x_minfc = fminfreq;
+ // post( "wahwah~ : minfreq: %f", x->x_minfc );
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_step(t_wahwah *x, t_floatarg fstep )
+{
+ if ( fstep > x->x_maxstep )
+ {
+ fstep = x->x_maxstep;
+ }
+ if ( fstep < 0 )
+ {
+ fstep = 0;
+ }
+ x->step = fstep*x->x_sense/x->x_samplerate;
+}
+
+static t_int *wahwah_perform(t_int *w)
+{
+ t_float *in = (t_float *)(w[1]);
+ t_float *out = (t_float *)(w[2]);
+ t_int n = (int)(w[3]);
+ t_wahwah *x = (t_wahwah*)(w[4]);
+ t_int i;
+
+ for (i=0; i<n; i++)
+ {
+ /* read input */
+ x->x0 = (int)((*(in+i))*32768);
+
+ x->y0 = (*(x->x_coeffs+(int)x->cur_coef*NBCOEFFS))*x->x0
+ + (*(x->x_coeffs+(int)x->cur_coef*NBCOEFFS+1))*x->x1
+ + (*(x->x_coeffs+(int)x->cur_coef*NBCOEFFS+2))*x->x2
+ - (*(x->x_coeffs+(int)x->cur_coef*NBCOEFFS+3))*x->y1
+ - (*(x->x_coeffs+(int)x->cur_coef*NBCOEFFS+4))*x->y2;
+
+ x->y2 = x->y1;
+ x->y1 = x->y0;
+ x->x2 = x->x1;
+ x->x1 = x->x0;
+
+ if(x->y0 > 32767.0)
+ x->y0 = 32767.0;
+ else if(x->y0 < -32768.0)
+ x->y0 = -32768.0;
+
+ *(out+i) = (t_float)(x->y0) / 32768.0;
+
+ x->cur_coef = x->cur_coef+x->down*x->step*(abs(x->x0)/(0.5*32768.0));
+ // post ( "wahwah~ : cur coeff : %f", x->cur_coef );
+ if(x->cur_coef > x->max_coef)
+ {
+ x->cur_coef = x->max_coef;
+ x->down = -1;
+ }
+ else if(x->cur_coef < x->min_coef)
+ {
+ x->cur_coef = x->min_coef;
+ x->down = 1;
+ }
+
+ }
+
+ return (w+5);
+}
+
+static void wahwah_preset(t_wahwah *x, t_float pnumber)
+{
+ switch ( (int)pnumber )
+ {
+ /* fast change medium wah wah */
+ case 1:
+ x->x_minfc = 100.0;
+ x->x_maxfc = 1600.0;
+ x->x_sense = 100.0;
+ x->x_maxstep = 60.0;
+ x->x_dbgain = 15.0;
+ x->x_Q = 1.0;
+ break;
+
+ /* slow change medium wah wah */
+ case 2:
+ x->x_minfc = 100.0;
+ x->x_maxfc = 1600.0;
+ x->x_sense = 50.0;
+ x->x_maxstep = 36.0;
+ x->x_dbgain = 15.0;
+ x->x_Q = 1.0;
+ break;
+
+ /* fast wah wah */
+ case 3:
+ x->x_minfc = 100.0;
+ x->x_maxfc = 600.0;
+ x->x_sense = 100.0;
+ x->x_maxstep = 66.0;
+ x->x_dbgain = 15.0;
+ x->x_Q = 1.0;
+ break;
+
+ /* ranged wah wah */
+ case 4:
+ x->x_minfc = 10.0;
+ x->x_maxfc = 2900.0;
+ x->x_sense = 100.0;
+ x->x_maxstep = 66.0;
+ x->x_dbgain = 15.0;
+ x->x_Q = 1.0;
+ break;
+
+ /* wah wah 400 - 2000 */
+ case 5:
+ x->x_minfc = 400.0;
+ x->x_maxfc = 2000.0;
+ x->x_sense = 100.0;
+ x->x_maxstep = 66.0;
+ x->x_dbgain = 15.0;
+ x->x_Q = 1.0;
+ break;
+
+ default:
+ post( "wahwah~ : unknown preset requested : %d", pnumber );
+ return;
+ break;
+ }
+ wahwah_set_coeffs( x );
+}
+
+static void wahwah_dsp(t_wahwah *x, t_signal **sp)
+{
+ dsp_add(wahwah_perform, 4, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n, x );
+}
+
+ /* clean up */
+static void wahwah_free(t_wahwah *x)
+{
+ if ( x->x_buf != NULL ) {
+ freebytes(x->x_buf, BFSZ*sizeof( double ) );
+ post( "Freed %d bytes", BFSZ*sizeof( double ) );
+ x->x_buf = NULL;
+ }
+ if ( x->x_coeffs != NULL ) {
+ freebytes(x->x_coeffs, COEFFSIZE*NBCOEFFS*sizeof( t_float ) );
+ post( "Freed %d bytes", COEFFSIZE*NBCOEFFS*sizeof( t_float ));
+ x->x_coeffs = NULL;
+ }
+}
+
+static void *wahwah_new(void)
+{
+ t_wahwah *x = (t_wahwah *)pd_new(wahwah_class);
+ outlet_new(&x->x_obj, &s_signal);
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("minfreq"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("maxfreq"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("sensibility"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("maxstep"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("dbgain"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("bandwidth"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("step"));
+
+ x->x_samplerate = (int)sys_getsr();
+
+ if ( !( x->x_buf = ( double* ) getbytes( BFSZ*sizeof( double ) ) ) )
+ {
+ post ("wahwah~ : could not allocate buffer" );
+ return NULL;
+ }
+ if ( !( x->x_coeffs = ( t_float* ) getbytes( COEFFSIZE*NBCOEFFS*sizeof( t_float ) ) ) )
+ {
+ post ("wahwah~ : could not allocate coeffs" );
+ return NULL;
+ }
+
+ // set default parameters
+ wahwah_preset( x, 1 );
+ wahwah_set_coeffs( x );
+
+ return (x);
+}
+
+void wahwah_tilde_setup(void)
+{
+ post( wahwah_version );
+ wahwah_class = class_new(gensym("wahwah~"), (t_newmethod)wahwah_new, (t_method)wahwah_free,
+ sizeof(t_wahwah), 0, 0);
+
+ CLASS_MAINSIGNALIN( wahwah_class, t_wahwah, x_f );
+ class_sethelpsymbol( wahwah_class, gensym("help-wahwah~.pd") );
+ class_addmethod(wahwah_class, (t_method)wahwah_step, gensym("step"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_minfreq, gensym("minfreq"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_maxfreq, gensym("maxfreq"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_sensibility, gensym("sensibility"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_maxstep, gensym("maxstep"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_dbgain, gensym("dbgain"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_bandwidth, gensym("bandwidth"), A_FLOAT, 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_dsp, gensym("dsp"), 0);
+ class_addmethod(wahwah_class, (t_method)wahwah_preset, gensym("preset"), A_FLOAT, 0);
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-06 14:07:13 +0000