feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
|
Last change
on this file since 082c88b was
41121f5,
checked in by Paul Brossier <piem@piem.org>, 11 years ago
|
|
python/demos/demo_filterbank.py: fix header
|
-
Property mode set to
100755
|
|
File size:
791 bytes
|
| Line | |
|---|
| 1 | #! /usr/bin/env python |
|---|
| 2 | |
|---|
| 3 | from aubio import filterbank, fvec |
|---|
| 4 | from pylab import loglog, show, subplot, xlim, ylim, xlabel, ylabel, title |
|---|
| 5 | from numpy import vstack, arange |
|---|
| 6 | |
|---|
| 7 | win_s = 2048 |
|---|
| 8 | samplerate = 48000 |
|---|
| 9 | |
|---|
| 10 | freq_list = [60, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 24000] |
|---|
| 11 | n_filters = len(freq_list) - 2 |
|---|
| 12 | |
|---|
| 13 | f = filterbank(n_filters, win_s) |
|---|
| 14 | freqs = fvec(freq_list) |
|---|
| 15 | f.set_triangle_bands(freqs, samplerate) |
|---|
| 16 | |
|---|
| 17 | coeffs = f.get_coeffs() |
|---|
| 18 | coeffs[4] *= 5. |
|---|
| 19 | |
|---|
| 20 | f.set_coeffs(coeffs) |
|---|
| 21 | |
|---|
| 22 | times = vstack([arange(win_s / 2 + 1) * samplerate / win_s] * n_filters) |
|---|
| 23 | title('Bank of filters built using a simple list of boundaries\nThe middle band has been amplified by 2.') |
|---|
| 24 | loglog(times.T, f.get_coeffs().T, '.-') |
|---|
| 25 | xlim([50, samplerate/2]) |
|---|
| 26 | ylim([1.0e-6, 2.0e-2]) |
|---|
| 27 | xlabel('log frequency (Hz)') |
|---|
| 28 | ylabel('log amplitude') |
|---|
| 29 | |
|---|
| 30 | show() |
|---|
Note: See
TracBrowser
for help on using the repository browser.
