path: root/pd/doc/3.audio.examples/I10.phase.bash.pd

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#X msg 443 28 \; pd dsp 1 \; window-size 1024 \; pitch 48 \; specshift
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#X text 96 196 magnitude of FT;
#X text 18 249 align partials to middle of window;
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#X text 414 180 set sample rate of the oscillator to;
#X text 416 195 Nyquist (here we're operating at twice;
#X text 418 211 the global "samplerate~" because of;
#X text 417 228 the overlap-2 blocking.) Also set phase;
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#X text 424 287 When analysis starts \, set a delay to;
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#X text 14 384 output phase-aligned frames;
#X text 395 514 output a bang to start recording;
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#X text 214 -1 PHASE BASHING;
#X text 455 515 updated for Pd version 0.39;
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#X text 197 403 sample length \, msec;
#X msg 198 288 ../sound/bell.aiff;
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#X text 201 266 change input sound;
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#X text 15 8 calculate Hann window table (variable window size) and
constants window-hz (fundamental frequency of analysis) \, window-sec
and window-msec (analysis window size in seconds and msec).;
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#X text 33 384 ---analyze---;
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#X text 47 18 This patch takes an incoming sound \, does an overlap-2
FFT analysis of it \, and bashes the phases of the spectra so that
when regenerated the components will all have zero phase at the middle
of each window. You can use the windows as waveforms and cross-fade
them at will without getting phase modulation. This might be useful
for making synthetic instruments that mimic the spectral variation
of recorded sounds.;
#X text 398 305 (hundredths of sec);
#X text 401 289 location in sample;
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#X text 458 262 ------ playback -------;
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#X text 50 440 sample;
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#X text 60 248 grain size;
#X text 62 264 in samples;
#X text 97 383 grain size;
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#X text 165 248 fractional;
#X text 164 265 part of loc;
#X text 295 224 integer part of loc;
#X text 328 247 middle of block;
#X text 310 290 cvt to samples;
#X text 522 265 run two copies 180 degrees out of phase;
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#X text 723 190 1/(block size);
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#X text 607 104 analysis overlap was 2 so our;
#X text 606 120 block size is (window size)/2;
#X text 12 -1 OVERLAPPED \, WINDOWED SAMPLE PLAYBACK;
#X text 357 0 - with controls for pitch \, location \, and spectral
shift;
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#X text 585 290 spectral shift;
#X text 583 306 (hundredths of;
#X text 646 323 octave);
#X text 126 398 live;
#X text 45 141 You can save the analyses and needn't be running the
FFT patch to do the resynthesis. You can read a sample \, select window
size \, and press "sample" to analyze it \, or else analyze a "live"
input. You'll hear the phase-bashed sample as the analysis runs. You
can regenerate the sound with specified pitch \, sample location \,
and spectral shift \, using the "playback" controls.;
#X text 83 278 analysis;
#X text 80 264 (redo;
#X text 83 294 after;
#X text 84 309 changing;
#X text 84 325 window;
#X text 85 339 size);
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