puredata-doc 0.46.7-3 / usr / share / puredata / doc / 3.audio.examples / D14.vibrato.pd

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#X text 236 438 since we'll multiply \,;
#X text 235 453 vibrato output should;
#X text 235 470 be centered at 1 \, not 0;
#X text 273 384 multiply by vib depth;
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#X text 62 425 apply vibrato;
#X text 66 453 fourth;
#X text 69 469 power;
#X text 97 537 waveform;
#X text 96 517 simple;
#X text 457 354 4/(exp(log(2)/1200)-1);
#X text 461 335 conversion factor is;
#X text 384 295 vibrato depth;
#X text 383 312 in cents;
#X text 228 274 vibrato speed;
#X text 227 291 in Hertz;
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#X text 88 9 USING ADSRS FOR PORTAMENTO AND ADDING VIBRATO TOO;
#X text 43 30 Portamento can be treated as a special case of an ADSR
envelope \, with 100 percent sustain. Vibrato is properly computed
in units of pitch \, but it's also possible to do the job without having
to convert from pitch to frequency units at the audio rate. To do this
we just raise the "pitch" to the fourth power \, so that it acts pseudo-exponentially.
Rather than add vibrato to the ADSR output \, we multiply a signal
which controls relative frequency. The relative frequency change is
one plus an oscillator.;
#X text 439 626 updated for Pd version 0.39;
#X text 45 185 The table below holds 6 cycles of vibrato with small
variations to get a not-exactly-repeating vibrato. We thus have to
divide vibrato frequency by six. You can just use a sine or triangle
wave if you prefer.;
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