/usr/share/puredata/doc/3.audio.examples/G02.delay.loop.pd is in puredata-doc 0.46.7-3.
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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 | #N canvas 130 225 601 527 12;
#X floatatom 36 197 5 -30 130 0 - - -;
#X floatatom 58 322 0 0 0 0 - - -;
#X text 88 196 <-- pitch;
#X text 88 321 <-- delay time;
#X text 287 420 write to delay line;
#X text 246 346 read from delay line;
#X text 72 393 add the original and the delayed signal;
#X obj 36 233 mtof;
#X msg 111 233 1;
#X obj 37 282 *~;
#X obj 37 394 +~;
#X obj 58 370 *~ 0.7;
#X text 116 370 feedback gain;
#X text 57 9 DELAYS WITH FEEDBACK;
#X text 33 39 You can feed the result of a delread~ module back into
its own delwrite~ \, as long as you're careful about stability. For
delays below 30 msec \, you can frequently hear the resonant pitch.
For longer delay times you get the famous old delay loop effect.;
#X obj 111 281 *~;
#X obj 111 257 adsr 1 100 1000 0 1000;
#X obj 37 463 output~;
#X text 32 118 We've added an amplitude control here so that the test
oscillator only speaks while you're dragging the pitch up and down.
Be sure to try shift-dragging on the pitch control.;
#X text 330 495 updated for Pd version 0.37-1;
#X obj 36 257 phasor~;
#X obj 58 346 delread~ G02-del 160;
#X obj 77 419 delwrite~ G02-del 2000;
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#X connect 1 0 21 0;
#X connect 7 0 20 0;
#X connect 8 0 16 0;
#X connect 9 0 10 0;
#X connect 10 0 17 0;
#X connect 10 0 17 1;
#X connect 10 0 22 0;
#X connect 11 0 10 1;
#X connect 15 0 9 1;
#X connect 16 0 15 0;
#X connect 16 0 15 1;
#X connect 20 0 9 0;
#X connect 21 0 11 0;
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