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#X floatatom 148 113 0 0 0 0 - - -;
#X obj 148 484 *~;
#X obj 271 411 line~;
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#X text 73 41 PITCH SHIFTER;
#X obj 271 385 pack 0 200;
#X obj 271 122 r window;
#X obj 148 87 r transpose;
#X obj 148 169 exp;
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#X obj 148 285 /;
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#X obj 370 370 r delay;
#X obj 148 510 +~;
#X obj 85 536 cos~;
#X obj 85 563 *~;
#X obj 226 607 +~;
#X obj 212 413 wrap~;
#X obj 307 467 *~;
#X obj 307 519 +~;
#X obj 244 546 cos~;
#X obj 244 573 *~;
#X msg 527 66 \; transpose 0 \; window 100 \; delay 0;
#X obj 527 40 loadbang;
#X obj 196 246 t b f;
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#X obj 212 386 +~ 0.5;
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#X obj 148 222 - 1;
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#X obj 148 248 * -1;
#X text 101 189 speed;
#X text 94 203 change;
#X text 76 302 tape head;
#N canvas 514 161 608 645 test-input 0;
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#X array array1 155944 float 0;
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#X restore 94 136 graph;
#X obj 163 503 tabread4~ array1;
#X obj 135 315 r totsamps;
#X obj 163 398 /;
#X obj 163 450 *~ 0;
#X obj 163 424 phasor~ 0;
#X obj 163 477 +~ 1;
#X msg 135 371 44100;
#X obj 135 345 t b f, f 7;
#X obj 206 454 r totsamps;
#X text 177 523 sample loop for;
#X text 177 540 test signal;
#X obj 105 25 loadbang;
#X obj 163 575 outlet~;
#X obj 337 164 r readfile;
#X obj 337 194 symbol;
#X msg 336 223 read -resize \$1 array1;
#X obj 336 251 soundfiler;
#X obj 336 279 s totsamps;
#X msg 105 59 \; readfile ../sound/bell.aiff;
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#X restore 279 43 pd test-input;
#X text 481 186 This is a classic rotating-tape-head style pitch shifter
using the vd~ variable delay object. There are two moving tape heads
\, each of which is loudest at the middle of its trajectory \, and
enveloped out at the moment it has to jump back (or forward) to start
another scratch. Most of the brain work is in computing how fast the
tape heads have to move to get the desired transposition., f 52;
#X text 480 326 The "window size" is the total trajectory of the read
points in the delay line \, in milliseconds. The delay times are controlled
by a phasor~ object. The second delay time \, 180 degrees out of phase
from the first one \, is computed using the "wrap" object., f 52;
#X text 479 421 The "window size" is the total trajectory of the read
points in the delay line \, in milliseconds. The delay times are controlled
by a phasor~ object. The second delay time \, 180 degrees out of phase
from the first one \, is computed using the "wrap" object., f 52;
#X text 478 512 The cos~ objects compute the fadein and fadeout of
the two delay line outputs. They each traverse the positive half of
the cosine waveform (phase -0.25 to +0.25) over the time the phase
goes from one end to the other., f 52;
#X obj 209 640 output~;
#X obj 148 342 phasor~;
#X text 643 631 updated for Pd version 0.37-1;
#X obj 370 423 max 1.5;
#X text 373 329 delay;
#X text 370 347 (msec);
#X obj 271 175 max 1;
#X text 76 315 rotation freq, f 9;
#X obj 148 536 vd~ G09-del;
#X obj 307 548 vd~ G09-del;
#X obj 279 74 delwrite~ G09-del 5000;
#X text 304 148 <= window (msec);
#X text 39 98 transposition;
#X text 38 111 (halftones) =>;
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