/usr/share/puredata/doc/3.audio.examples/D01.envelope.gen.pd is in puredata-doc 0.46.7-3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | #N canvas 173 105 567 576 12;
#X text 246 260 attack;
#X text 317 261 release;
#X obj 248 397 line~;
#X msg 318 355 0 500;
#X text 126 7 ENVELOPE GENERATORS;
#X obj 65 369 phasor~ 50;
#X obj 65 417 *~;
#X obj 65 465 wrap~;
#X msg 247 355 1 2500;
#X obj 65 393 -~ 0.5;
#X msg 182 331 10 200;
#X obj 247 331 del 200;
#X text 26 22 This patch uses an envelope generator to control a sound.
When you hit "attack" two things happen. First \, the line~ object
rises to 10 in 200 milliseconds. Then after a "delay" of the same 200
msec \, the second message sends the line~ back down to 1 over another
2500 msec. The "release" just ramps us down to zero at the end.;
#X obj 65 513 output~;
#X text 311 550 updated for Pd version 0.37;
#X obj 65 441 +~ 0.5;
#X obj 65 489 hip~ 5;
#X obj 247 280 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X obj 318 281 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X msg 257 308 stop;
#X text 28 121 You can hit the "attack" and/or "release" while something
is still going on from a previous attack or release \, and the envelope
generator does the ``right thing". In particular \, the release button
sends a "stop" to the "del" object \, in case it is still scheduled
to go off from a previous attack.;
#X text 27 218 The synthesis method is a form of waveshaping \, which
is the subject of a later chapter.;
#X connect 2 0 6 1;
#X connect 3 0 2 0;
#X connect 5 0 9 0;
#X connect 6 0 15 0;
#X connect 7 0 16 0;
#X connect 8 0 2 0;
#X connect 9 0 6 0;
#X connect 10 0 2 0;
#X connect 11 0 8 0;
#X connect 15 0 7 0;
#X connect 16 0 13 0;
#X connect 17 0 11 0;
#X connect 17 0 10 0;
#X connect 18 0 3 0;
#X connect 18 0 19 0;
#X connect 19 0 11 0;
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