source: python/demos/demo_filter.py @ 89bc6f4

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5
Last change on this file since 89bc6f4 was 01f7598, checked in by Paul Brossier <piem@piem.org>, 9 years ago

python/demos/demo_filter.py: clean-up

  • Property mode set to 100755
File size: 994 bytes
Line 
1#! /usr/bin/env python
2
3
4def apply_filter(path):
5    from aubio import source, sink, digital_filter
6    from os.path import basename, splitext
7
8    # open input file, get its samplerate
9    s = source(path)
10    samplerate = s.samplerate
11
12    # create an A-weighting filter
13    f = digital_filter(7)
14    f.set_a_weighting(samplerate)
15    # alternatively, apply another filter
16
17    # create output file
18    o = sink("filtered_" + splitext(basename(path))[0] + ".wav", samplerate)
19
20    total_frames = 0
21    while True:
22        samples, read = s()
23        filtered_samples = f(samples)
24        o(filtered_samples, read)
25        total_frames += read
26        if read < s.hop_size: break
27
28    duration = total_frames / float(samplerate)
29    print ("read {:s}".format(s.uri))
30    print ("applied A-weighting filtered ({:d} Hz)".format(samplerate))
31    print ("wrote {:s} ({:.2f} s)".format(o.uri, duration))
32
33if __name__ == '__main__':
34    import sys
35    for f in sys.argv[1:]:
36        apply_filter(f)
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