PyAudio example for OpenSesame

# Example modified from
# <http://people.csail.mit.edu/hubert/pyaudio/#docs>

"""PyAudio Example: Play a WAVE file."""

import pyaudio
import wave
import sys

# Get from the filepool
src = exp.get_file('example.wav')

# Index of the output device or None for default
output_device_index = None

# The chunk size for playing back the stream
chunk_size = 1024

# Initialize PyAudio and open an output stream
p = pyaudio.PyAudio()
wf = wave.open(src, 'rb')
stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
    channels=wf.getnchannels(),
    rate=wf.getframerate(),
    output=True,
    output_device_index=output_device_index)

# Read and play stream data until the stream is empty
data = wf.readframes(chunk_size)
while data != '':
    stream.write(data)
    data = wf.readframes(chunk_size)

# Clean up
stream.stop_stream()
stream.close()
p.terminate()