On Tue, 18 Mar 2003, Frank Barknecht wrote:
> Hallo,
>
> I'm starting to play around with the dmix plugin. I follow the
> instructions on alsa-prohject.org regarding software mixing.
>
> Now on my second card, a SBLive, I can use aplay as expected:
>
> $ aplay -D plug:dmix some.wav
>
> works fine.
>
> But my first card is a M-Audio Audiophile, which uses the ice1712
> driver. It gives me this error:
>
> $ aplay -D plug:dmix
> ALSA lib pcm_dmix.c:1290:(snd_pcm_dmix_initialize_slave) requested format is not
> available
> ALSA lib pcm_dmix.c:1534:(snd_pcm_dmix_open) unable to initialize slave
>
> aplay: main:480: audio open error: Invalid argument
>
> I know, that the ice1712-chips want a very specific stream format, but I
> don't know, which one. Could someone help me with setting up the
> correct command line options or and asoundrc, that makes a
> ice1712-dmix pcm available? Isn't it possible, to read the supported
> stream format somewhere in /proc/asound?
Actually, the dmix plugin works only with the signed 16-bit little endian
format (and fails if hardware doesn't support it). I'm going to extend the
mixing routines for 24-bit/32-bit sample formats as well when I'll find a
bit of time.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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