ref: a93dab375dc53ce539d187fb22a0a18cba8de66d
dir: /python/demos/demo_simple_robot_voice.py/
#! /usr/bin/env python
import sys
from aubio import source, sink, pvoc
if __name__ == '__main__':
if len(sys.argv) < 2:
print 'usage: %s <inputfile> <outputfile>' % sys.argv[0]
sys.exit(1)
samplerate = 44100
f = source(sys.argv[1], samplerate, 256)
g = sink(sys.argv[2], samplerate)
total_frames, read = 0, 256
win_s = 512 # fft size
hop_s = win_s / 2 # hop size
pv = pvoc(win_s, hop_s) # phase vocoder
while read:
samples, read = f()
spectrum = pv(samples) # compute spectrum
#spectrum.norm *= .8 # reduce amplitude a bit
spectrum.phas[:] = 0. # zero phase
new_samples = pv.rdo(spectrum) # compute modified samples
g(new_samples, read) # write to output
total_frames += read
print "wrote", total_frames, "from", f.uri, "to", g.uri