feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change
on this file since b4fd9d6 was
5d5d6b9,
checked in by Paul Brossier <piem@piem.org>, 12 years ago
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python/demos: add demo_pitch.py and demo_waveform_plot.py
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Property mode set to
100755
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File size:
903 bytes
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1 | #! /usr/bin/env python |
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2 | |
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3 | import sys |
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4 | from aubio import source, sink, pvoc |
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5 | |
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6 | if __name__ == '__main__': |
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7 | if len(sys.argv) < 2: |
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8 | print 'usage: %s <inputfile> <outputfile>' % sys.argv[0] |
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9 | sys.exit(1) |
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10 | samplerate = 44100 |
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11 | f = source(sys.argv[1], samplerate, 256) |
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12 | g = sink(sys.argv[2], samplerate) |
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13 | total_frames, read = 0, 256 |
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14 | |
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15 | win_s = 512 # fft size |
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16 | hop_s = win_s / 2 # hop size |
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17 | pv = pvoc(win_s, hop_s) # phase vocoder |
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18 | |
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19 | while read: |
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20 | samples, read = f() |
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21 | spectrum = pv(samples) # compute spectrum |
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22 | #spectrum.norm *= .8 # reduce amplitude a bit |
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23 | spectrum.phas[:] = 0. # zero phase |
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24 | new_samples = pv.rdo(spectrum) # compute modified samples |
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25 | g(new_samples, read) # write to output |
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26 | total_frames += read |
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27 | |
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28 | print "wrote", total_frames, "from", f.uri, "to", g.uri |
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29 | |
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30 | |
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