[linux-audio-user] 4 outputs with sblive! + jack?

Russell Hanaghan hanaghan at starband.net
Mon May 17 10:37:46 EDT 2004


On Mon, 2004-05-17 at 01:00, Joern Nettingsmeier wrote:
> you can use the pre-defined surround40 device, *but* jackd will 
> assume it also has 4 input channels and refuse to start, so you have 
> to define a new device based on surround40.
> 
> add this to your .asoundrc:
> 
> ctl.jack42 {
>          type hw
>          card 0
> }
> 
> pcm.jack42 {
>          type asym
>          playback.pcm {
>                  # route for mmap workaround
>                  type route
>                  slave.pcm surround40
>                  ttable.0.0 1
>                  ttable.1.1 1
>                  ttable.2.2 1
>                  ttable.3.3 1
>          }
>          capture.pcm {
>                  # 2 channels only
>                  type hw
>                  card 0
>          }
> }
> 
> 
> then specify "jack42" as your alsa device when starting jackd. works 
> like a charm for me.

So when this is running, what controls in alsa mixer are relevant for
the additional channels?

R~
> 
> 
> robcanning wrote:
> > hi,
> > 
> > what is the best way to get 4 independent outputs from an sblive!
> > i am using pd with jack but in qjackctl i only see 2 alsa_pcm playback
> > devices.  Is it possible to get 4 outputs using an sblive and jack?
> > if not what's the best approach... alsa? oss?
> > thanks,
> > 
> > rob (planetccrma fedora core1)
> > 




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