At Fri, 31 Mar 2006 06:14:39 -0600,
Moshe Yudkowsky wrote:
>
> Clemens, Takashi,
>
> Thanks for your response. I have two follow-up questions.
>
>
> >>> I am unable to play mu-law files.
> >> ALSA does support mu-Law.
> >>
> >>> If I try
> >>>
> >>> aplay file.wav
> >>>
> >>> I get the error message
> >>>
> >>> aplay: test_wavefile:726: can't play not PCM-coded WAVE-files
> >> Aplay's module for reading .wav files does not support Mu-Law.
>
> I should have mentioned that I had already tried to use the -f FORMAT
> before I wrote my original request, but that it fails with the following
> error:
>
> > aplay -t raw -f MU_LAW -r 8000 file.ulaw
> > Playing raw data 'file.ulaw' : Mu-Law, Rate 8000 Hz, Mono
> > aplay: set_params:896: Sample format non available
Then use cat
% cat file.ulaw | aplay -t raw -f MU_LAW -r 8000 -c 1
> The standard (sox-based) "play" command works:
>
> play -t raw -s b -f U -r 8000 file.ulaw
>
>
> What I'm trying to understand is:
>
> (a) Why does aplay fail?
If WAV file is given, aplay ignores -f option.
Yeah, it should be better fixed.
> (b) How can I create a plug-in entry that plays mu-law? The
> documentation says that a mu-law plug-in can convert mu-law to linear
> and vice-versa, but it does not explain *how* to set that up, either way.
The question is rather what you want exactly with the user-defined
mulaw plugin...
Takashi
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