Re: [Alsa-user] Multiple rates with dmix plugin

[Dominique D. <dom...@fr...>]

Andrew Martin <ug...@in...> writes:

> Hello,
>
> I'm wondering if it's possible to have software mixing via the dmix
> plugin, but still be able to choose either 48000hz or 44100hz as the
> rate for a specific app.  Something like having two dmix statements in
> .asoundrc.  Being able to specify 'mplayer -ao alsa:dmix48' would be
> ideal.  I currently have one dmix block with 'rate 44100'.

AFAIK you have to use a "type rate" device to have a correct
resampling. For isntance:

pcm.nforce {
type rate
slave {
  pcm "hw:0,0"
  rate 44100
  }
}

>
> pcm.dmix44  {
>      type dmix
>      ipc_key 1024
>      slave {
>          pcm "hw:0,0"
>          period_time 0
>          period_size 1024
>          buffer_size 8192
>          #periods 128
>          rate 44100
> }
>

I'd use:


pcm.dmix44  {
     type rate
     rate 44100
     slave {
         pcm "hw:0,0"
         }
}

HTH