It seems our sound cards can't play mulaw data. Use native-format
16-bit signed data instead. Hope this works for you; it works for me.
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@ -4,9 +4,11 @@ import errno
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import fcntl
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import linuxaudiodev
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import os
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import sys
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import select
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import sunaudio
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import time
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import audioop
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SND_FORMAT_MULAW_8 = 1
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@ -27,6 +29,15 @@ def play_sound_file(path):
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raise TestSkipped, msg
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raise TestFailed, msg
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# convert the data to 16-bit signed
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data = audioop.ulaw2lin(data, 2)
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# set the data format
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if sys.byteorder == 'little':
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fmt = linuxaudiodev.AFMT_S16_LE
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else:
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fmt = linuxaudiodev.AFMT_S16_BE
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# at least check that these methods can be invoked
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a.bufsize()
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a.obufcount()
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@ -35,7 +46,7 @@ def play_sound_file(path):
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a.fileno()
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# set parameters based on .au file headers
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a.setparameters(rate, 8, nchannels, linuxaudiodev.AFMT_MU_LAW, 1)
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a.setparameters(rate, 16, nchannels, fmt)
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a.write(data)
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a.flush()
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a.close()
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