I got it working! There was another thread http://tinyurl.com/pebqc on
this group where someone had the same problem. I changed my code to
the following:
from twisted.internet.task import LoopingCall
from twisted.internet import reactor
import os, sys, wave, audioop
"""
While playing the contents of test1.wav, talk into the mic
and have the audio recorded into /tmp/out.wav
"""
def playnlisten_out():
audio = wavin.readframes(1024)
stereoaudio = audioop.tostereo(audio, 2, 1, 1)
dspout.write(stereoaudio)
def playnlisten_in():
audio = dspin.read(640)
wavout.write(audio)
def both():
playnlisten_out()
playnlisten_in()
dspout = ossaudiodev.open('/dev/dsp', 'w') # 2 file handles
dspin = ossaudiodev.open('/dev/dsp', 'r')
wavin = wave.open("test1.wav", "r")
wavout = wave.open("/tmp/out.wav", "w")
both_loop = LoopingCall(both)
both_loop.start(0.02)
reactor.run()
and it worked as expected. I did not need to mess around with
/dev/mixer.
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