At Sun, 02 Apr 2006 13:25:31 -0500,
Moshe Yudkowsky wrote:
>
>
> >> (a) Why does aplay fail?
> >
> > If WAV file is given, aplay ignores -f option.
> > Yeah, it should be better fixed.
>
> Well, either aplay or the documentation. Thanks for the hint.
>
> >> (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...
>
> Well, I'd like to discover why it is that at least two different
> programs that rely on ALSA cannot play mu-law files.
I guess they're accessing like hw:xxx, i.e. without using plug
interface?
> One way to debug this would be to make certain that Alsa can indeed play
> mulaw files on my system. I would like to create an ALSA plugin
> mulawplayer so I can give the command:
>
> cat mulaw.wav | aplay -Dmulawplayer
>
> and have it work.
Then use the following:
pcm.mulawplayer {
type mulaw
slave.pcm "hw"
}
The channels and sample rate should be given as aplay options,
though.
Takashi
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