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Use PyAudio to play a list of WAV files (Python recipe) by Vasudev Ram
ActiveState Code (http://code.activestate.com/recipes/579116/)

This recipe shows how to use PyAudio, a 3rd-party Python audio toolkit, to play a list of WAV files on your computer. This is an enhanced version of a basic WAV code example on the PyAudio site. You can specify either one WAV filename on the command line, like this:

py pyaudio_play_wav.py chimes.wav

or specify a text file containing names of WAV files to play, like this:

py pyaudio_play_wav.py -f wav_fil_list.txt

The only dependency is PyAudio, which you can install with pip.

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'''
Module to play WAV files using PyAudio.
Author: Vasudev Ram - http://jugad2.blogspot.com
Adapted from the example at:
https://people.csail.mit.edu/hubert/pyaudio/#docs
PyAudio Example: Play a wave file.
'''

import pyaudio
import wave
import sys
import os.path
import time

CHUNK_SIZE = 1024

def play_wav(wav_filename, chunk_size=CHUNK_SIZE):
    '''
    Play (on the attached system sound device) the WAV file
    named wav_filename.
    '''

    try:
        print 'Trying to play file ' + wav_filename
        wf = wave.open(wav_filename, 'rb')
    except IOError as ioe:
        sys.stderr.write('IOError on file ' + wav_filename + '\n' + \
        str(ioe) + '. Skipping.\n')
        return
    except EOFError as eofe:
        sys.stderr.write('EOFError on file ' + wav_filename + '\n' + \
        str(eofe) + '. Skipping.\n')
        return

    # Instantiate PyAudio.
    p = pyaudio.PyAudio()

    # Open stream.
    stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
        channels=wf.getnchannels(),
        rate=wf.getframerate(),
                    output=True)

    data = wf.readframes(chunk_size)
    while len(data) > 0:
        stream.write(data)
        data = wf.readframes(chunk_size)

    # Stop stream.
    stream.stop_stream()
    stream.close()

    # Close PyAudio.
    p.terminate()

def usage():
    prog_name = os.path.basename(sys.argv[0])
    print "Usage: {} filename.wav".format(prog_name)
    print "or: {} -f wav_file_list.txt".format(prog_name)

def main():
    lsa = len(sys.argv)
    if lsa < 2:
        usage()
        sys.exit(1)
    elif lsa == 2:
        play_wav(sys.argv[1])
    else:
        if sys.argv[1] != '-f':
            usage()
            sys.exit(1)
        with open(sys.argv[2]) as wav_list_fil:
            for wav_filename in wav_list_fil:
                # Remove trailing newline.
                if wav_filename[-1] == '\n':
                    wav_filename = wav_filename[:-1]
                play_wav(wav_filename)
                time.sleep(3)

if __name__ == '__main__':
    main()

After writing it, I tried running the program with many WAV files from the c:\windows\media directory. It worked well for all of them. The sounds were clear.

Tags: audio, music, python, python2, sound

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