[vox-tech] AC97 Sound Card

[Jonathan Stickel]

Ken Bloom wrote:
> On Mon, Mar 08, 2004 at 12:59:03PM -0800, Mark K. Kim wrote:
> 
>>Crappy sound system... someone needs to make /dev/dsp into a virtual
>>device that lets multiple apps open it directly and mix sound internally.
>>
>>-Mark
> 
> 
> ALSA can do this - or at least something like this. Your card supports
> hardware mixing, it will use that, if not then you can use the dmix
> plugin, by configuring /etc/asound.conf like this:
> 
> 
> pcm.!default {
>         type plug
>         slave.pcm dmixer
> }
>                                                                         
> pcm.dmixer {
>         type dmix
>         ipc_key 1024 # This must be a unique IPC key (see ipcs output)
>         ipc_key_add_uid true # UID will be added to IPC key
>         slave {
>                 pcm "hw:0"
>                 period_time 0
>                 period_size 1024 # Must be power of 2 for alsa-oss
>                 buffer_size 8192 # ditto
>                 rate 44100
>         }
> }
> 
> pcm.dsp0 pcm.default
> ctl.mixer0 "hw:0"

I cannot get dmix to work.  Is this really all that's necessary?  I'll 
repeat Mark, "Crappy sound system..."

Jonathan