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#!/usr/bin/python2.7
import wave
import soundtouch
from array import array
# Open a .WAV file
FILEPATH = "./The_beach_boys__Kokomo9_5_AD9wXuYm4a_2.wav"
wf = wave.open(FILEPATH)
# Create the sountouch pointer
st = soundtouch.SoundTouch(wf.getframerate(), wf.getnchannels())
# Specify the shift, as 1 whole step
st.set_pitch_shift(2)
# Feed in samples and add processed samples to resstr
resstr = ""
while True:
buf = wf.readframes(4000)
if not buf:
break
st.put_samples(buf)
while st.ready_count() > 0:
resstr += st.get_samples(4000)
# Flush any additional samples
waiting = st.waiting_count()
ready = st.ready_count()
flushed = ""
# Add silence until another chunk is pushed out
silence = array('h', [0] * 64)
while st.ready_count() == ready:
st.put_samples(silence)
# Get all of the additional samples
while st.ready_count() > 0:
flushed += st.get_samples(4000)
st.clear()
if len(flushed) > 2 * wf.getnchannels() * waiting:
flushed = flushed[0:(2 * wf.getnchannels() * waiting)]
resstr += flushed
# Clean up
wf.close()
del st
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