python/demos/demo_a_weighting.py

   1 #! /usr/bin/env python
   2
   3
   4 def apply_filter(path, params = {}):
   5     from aubio import source, sink, digital_filter
   6     from os.path import basename, splitex, splitextt
   7     s = source(path)
   8     f = digital_filter(7)
   9     f.set_a_weighting(s.samplerate)
  10     #f = digital_filter(3)
  11     #f.set_biquad(...)
  12     o = sink("filtered_" + splitext(basename(path))[0] + ".wav")
  13     # Total number of frames read
  14     total_frames = 0
  15
  16     while True:
  17         samples, read = s()
  18         filtered_samples = f(samples)
  19         o(samples, read)
  20         total_frames += read
  21         if read < s.hop_size: break
  22     print "filtered", s.uri, "to", o.uri, "using an A-weighting filter"
  23
  24 if __name__ == '__main__':
  25     import sys
  26     for f in sys.argv[1:]:
  27         apply_filter(f)