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#X text 68 9 PITCH SHIFTER;
#X obj 205 269 pack 0 200;
#X obj 237 86 r window;
#X obj 19 61 r transpose;
#X obj 19 143 exp;
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#X obj 19 259 /;
#X obj 146 189 * 0.001;
#X obj 314 365 line~;
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#X obj 314 263 r delay;
#X obj 82 384 +~;
#X obj 19 410 cos~;
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#X obj 19 466 +~;
#X obj 106 317 wrap~;
#X obj 251 360 *~;
#X obj 251 393 +~;
#X obj 188 420 cos~;
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#X msg 492 56 \; transpose 0 \; window 100 \; delay 0;
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#X obj 146 216 t b f;
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#X obj 106 290 +~ 0.5;
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#X obj 19 196 - 1;
#X obj 19 117 * 0.05776;
#X obj 19 222 * -1;
#X text 53 86 <-- transposition;
#X text 96 99 (halftones);
#X text 82 163 speed;
#X text 81 177 change;
#X text 281 111 <--window (msec);
#X text 54 252 tape head;
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#X obj 139 439 phasor~ 0;
#X obj 139 492 +~ 1;
#X msg 139 386 44100;
#X obj 139 360 t b f;
#X obj 182 469 r totsamps;
#X text 153 538 sample loop for;
#X text 153 555 test signal;
#X obj 162 30 loadbang;
#X obj 139 590 outlet~;
#X obj 393 169 r readfile;
#X obj 393 199 symbol;
#X msg 392 228 read -resize \$1 array1;
#X obj 392 256 soundfiler;
#X obj 392 284 s totsamps;
#X msg 161 64 \; readfile ../sound/bell.aiff;
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#X restore 264 11 pd test-input;
#X text 425 153 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.;
#X text 425 272 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.;
#X text 423 362 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.;
#X text 422 454 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.;
#X obj 19 493 output~;
#X obj 19 316 phasor~;
#X text 689 534 updated for Pd version 0.37-1;
#X obj 314 316 max 1.5;
#X text 317 222 delay;
#X text 314 240 (msec);
#X obj 237 139 max 1;
#X text 55 265 rotation freq;
#X obj 82 410 vd~ G09-del;
#X obj 251 422 vd~ G09-del;
#X obj 264 42 delwrite~ G09-del 5000;
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