/usr/share/puredata/doc/3.audio.examples/B12.sampler.transpose.pd is in puredata-doc 0.45.4-1.
This file is owned by root:root, with mode 0o644.
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#X array table21 44103 float 0;
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#X restore 645 291 graph;
#X obj 467 506 loadbang;
#X obj 19 508 hip~ 5;
#X floatatom 10 254 0 0 0 0 - - -;
#X obj 10 279 * 441;
#X obj 10 401 +~ 1;
#X text 47 253 <-- chunk size (100ths of a second);
#X obj 471 402 adc~ 1;
#X obj 471 427 hip~ 5;
#X msg 486 449 bang;
#X obj 44 482 *~;
#X obj 106 404 line~;
#X obj 106 354 * 441;
#X floatatom 106 329 0 0 0 0 - - -;
#X obj 106 379 pack 0 100;
#X text 152 331 <-- read point in 100ths of a second;
#X obj 44 433 +~;
#X obj 106 429 samphold~;
#X obj 10 329 samphold~;
#X obj 10 304 sig~;
#X obj 10 376 *~;
#X text 18 5 CALCULATING LOOP FREQUENCY AS FUNCTION OF TRANSPOSITION
;
#X obj 124 485 r~ phase;
#X obj 10 204 s~ phase;
#X obj 68 304 r~ phase;
#X obj 26 351 r~ phase;
#X obj 164 405 r~ phase;
#X obj 151 299 s chunk-size;
#X floatatom 10 50 0 0 0 0 - - -;
#X text 48 51 <-- transposition (10ths of a halftone);
#X obj 151 274 * 0.01;
#X text 264 287 chunk size;
#X text 264 309 in seconds;
#X obj 21 105 r chunk-size;
#X obj 21 130 t b f;
#X obj 10 154 /;
#X text 80 131 divide speed change by chunk;
#X text 78 152 size to get loop frequency;
#X text 382 75 The transposition is frequency in Hz. divided by chunk
size in seconds. This patch calculates the loop frequency as a function
of desired transposition;
#X text 384 126 Notice now that we get Doppler effects when the chunk
size changes. You can suppress that if you don't want it \, by converting
the chunk size to an audio signal \, sampling and holding it. But then
there would be more work to deal with very low frequencies never triggering
the sample and hold...;
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#X obj 124 556 cos~;
#X obj 19 533 output~;
#X obj 44 458 tabread4~ table21;
#X text 527 449 <-- record;
#X text 560 513 v-- re-read original table;
#X text 682 572 updated for Pd version 0.37;
#X text 647 425 --- 44103 samples ---;
#X obj 10 75 expr pow(2 \, $f1/120);
#X text 199 75 speed change;
#X text 387 208 You might also want to have a way to retrigger the
loop to sync it with some other process. By the time we had all this
built the patch would be fairly involved. For now \, we'll move on
to the next topic...;
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#X obj 471 476 tabwrite~ table21;
#X msg 467 533 read ../sound/voice.wav table21;
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