At Thu, 9 Jan 2003 10:36:45 +0100 (MET),
Clemens Ladisch wrote:
> 
> Song KiSun wrote:
> > I bought this usb-audio interface one year ago, I couldn't use
> > this interface for several problem(only 24bit audio. etc...),
> > but alsa tells that was working.
> >
> > #mpg321 some.mp3   or
> >  esd& ( by root)
> >
> > Audio device open for 44.1Khz, stereo, 16bit failed
> > ...
> 
> It seems your device supports 24-bit audio only. The old OSS API doesn't
> support 24 bits, so you have to use programs using the ALSA API. (For
> mpg321, try -dt alsa09)

well, theoretically it's possible to do conversion for oss emulation,
but so far we didn't implement the conversion of 24bit-3bytes-format
on kernel OSS-emulation.  if the OSS is emulated on user-space via
libaoss, it may work, though.

besides, the alsa pcm device should be given with plug layer for
playing mp3 or other 16bit-format (suppose that the application uses
hw layer).
for example, in the case of mpg321, you might need to specify
"plughw:0" with -a option, where the number is dependent upon the
card number of the device.


ciao,

Takashi


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