Re: Alsa-lib problem

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Nambiar, Anil wrote:
> Hi,
> 
>             I am developing ALSA based sound driver for our arm based soc.
> The driver is built as part of the kernel rather than as a loadable module.
> If I run a simple wave player which has OSS based interface, it works fine.
> Even mplayer works fine in OSS emulation mode. But if I run any native alsa
> based player it gives error opening the device. For eg: running 'aplay -D
> default demo.wav" give the following error: 
> 
> ALSA lib pcm.c:2090:(snd_pcm_open_noupdate) Unknown PCM default
> 
> aplay: main:533: audio open error: No such file or directory
> 

You probably do not have a "default" device defined for your card due to 
the lack of a config file.
But, in order to test it, even though you don't have a config file, try
speaker-test -c2 -Dplughw:0,0

if that works, all you then need is a config file for your card.
cat /proc/asound/cards  and note down whatever is in the [....    ] bit.
Here I get:
0 [Audigy2        ]: Audigy2 - Audigy 4 PRO [SB0380]
                      Audigy 4 PRO [SB0380] (rev.4, serial:0x20071102) 
at 0x9800, irq 20


So I have an "Audigy2" file in /usr/share/alsa/cards
You will need to create one for your card.



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