ref: 4da6f2020cda055de3b6e1199e1ebb5011a72a25
dir: /python/demos/demo_filter.py/
#! /usr/bin/env python
def apply_filter(path):
from aubio import source, sink, digital_filter
from os.path import basename, splitext
# open input file, get its samplerate
s = source(path)
samplerate = s.samplerate
# create an A-weighting filter
f = digital_filter(7)
f.set_a_weighting(samplerate)
# alternatively, apply another filter
# create output file
o = sink("filtered_" + splitext(basename(path))[0] + ".wav", samplerate)
total_frames = 0
while True:
samples, read = s()
filtered_samples = f(samples)
o(filtered_samples, read)
total_frames += read
if read < s.hop_size: break
duration = total_frames / float(samplerate)
print ("read {:s}".format(s.uri))
print ("applied A-weighting filtered ({:d} Hz)".format(samplerate))
print ("wrote {:s} ({:.2f} s)".format(o.uri, duration))
if __name__ == '__main__':
import sys
for f in sys.argv[1:]:
apply_filter(f)