[alsa-devel] open sound device from asound.conf

[Sebastian H.]

Am 23.07.2010 11:12, schrieb Peter Lukac:
> hello all
> maybe trivial question...
> 
> I want open sound device from /etc/asound.conf with API
> snd_pcm_open() but unsuccessfull. As name i'm used:
> 
> "plughw:0,0"
> "plughw:0,1"
> "plughw:0,2"
> "plughw:1,0"
> "plughw:1,1"
> "plughw:1,2"
> ...
> i'm try alternative name with "hw:X,Y"
> "hw:0,0"
> "hw:0,1"
> ...
> but in this method i'm open only HW device.
> I'm get follow error:
> ALSA lib pcm_hw.c:1429:(_snd_pcm_hw_open) Invalid value for card 
> 
> how can i open my "virtual" device in asound.conf
> 
> here is asound.conf:
> 
> 
> pcm.!default {
>         type plug
>         slave.pcm "output"
>     }
> 
> pcm.output {
>     type dmix
>     ipc_key 1024
>     slave {
>         pcm "hw:0,0"
>         channels 2
>         rate 44100
>         format S16_LE
>     }
> }
> 
> pcm.dsp0 {
>     type plug
>     slave.pcm "output"
> }
> 
> ...exists some universal method how can i open all HW device and "virtual" 
> devices?


Did you try to open "default", "output" or "dsp0" since these are the
names of your pcm defines?

Cheers,
Sebastian