/usr/share/puredata/doc/3.audio.examples/C02.sawtooth-foldover.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 | #N canvas 180 71 562 473 12;
#X obj 155 348 output~;
#X text 310 443 updated for Pd version 0.37;
#X text 56 2 FOLDOVER IN SAWTOOTH WAVES;
#X obj 154 320 clip~ 0 1;
#X obj 155 153 mtof;
#X floatatom 155 131 3 0 0 0 - - -;
#X obj 155 269 *~ 20;
#X obj 155 295 -~ 19;
#X obj 155 177 phasor~;
#N canvas 0 0 560 183 /SUBPATCH/ 0;
#X obj 25 74 loadbang;
#X msg 25 99 61;
#X obj 25 124 outlet;
#X text 7 6 This sets the pitch initially to 61 when the patch is first
opened.;
#X connect 0 0 1 0;
#X connect 1 0 2 0;
#X restore 155 105 pd;
#X text 190 130 <--pitch;
#X obj 164 206 output~;
#X text 237 205 <--sawtooth amplitude;
#X text 233 373 <--pulse train amplitude;
#X text 28 406 We'll explain more about making pulses later on... this
example is mostly intended as ear training.;
#X text 19 23 In more ordinary kinds of waveforms \, foldover comes
across as a "cheap synth" sound. You can hear the foldover clearly
in the pulse train here \, and less clearly (but still audibly) in
the straight sawtooth \, especially at high pitches.;
#X connect 3 0 0 0;
#X connect 3 0 0 1;
#X connect 4 0 8 0;
#X connect 5 0 4 0;
#X connect 6 0 7 0;
#X connect 7 0 3 0;
#X connect 8 0 6 0;
#X connect 8 0 11 0;
#X connect 8 0 11 1;
#X connect 9 0 5 0;
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