feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change
on this file since d47a5e19 was
41121f5,
checked in by Paul Brossier <piem@piem.org>, 11 years ago
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python/demos/demo_filterbank.py: fix header
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Property mode set to
100755
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File size:
791 bytes
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1 | #! /usr/bin/env python |
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2 | |
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3 | from aubio import filterbank, fvec |
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4 | from pylab import loglog, show, subplot, xlim, ylim, xlabel, ylabel, title |
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5 | from numpy import vstack, arange |
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6 | |
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7 | win_s = 2048 |
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8 | samplerate = 48000 |
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9 | |
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10 | freq_list = [60, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 24000] |
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11 | n_filters = len(freq_list) - 2 |
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12 | |
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13 | f = filterbank(n_filters, win_s) |
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14 | freqs = fvec(freq_list) |
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15 | f.set_triangle_bands(freqs, samplerate) |
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16 | |
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17 | coeffs = f.get_coeffs() |
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18 | coeffs[4] *= 5. |
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19 | |
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20 | f.set_coeffs(coeffs) |
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21 | |
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22 | times = vstack([arange(win_s / 2 + 1) * samplerate / win_s] * n_filters) |
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23 | title('Bank of filters built using a simple list of boundaries\nThe middle band has been amplified by 2.') |
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24 | loglog(times.T, f.get_coeffs().T, '.-') |
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25 | xlim([50, samplerate/2]) |
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26 | ylim([1.0e-6, 2.0e-2]) |
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27 | xlabel('log frequency (Hz)') |
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28 | ylabel('log amplitude') |
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29 | |
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30 | show() |
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