Re: [Alsa-user] Any asoundrc, dmix and ice1712 wizard out there?

[Jaroslav K. <pe...@su...>]

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 <pe...@su...>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs