[linux-audio-user] Getting two sound cards to work

[Lee Revell]

On Sat, 2005-04-30 at 00:51 +0200, Christoph Eckert wrote:
> > I have a different 2 card problem.  hw:1 is my main card.
> >  I'd like to duplicate the output of hw:1 and send it to
> > the output of hw:0. Mandrake 10.1, ALSA 1.0.6 here.
> 
> there's an ALSA plugin which can do so - unfortunately I 
> forgot the name. I remember DMIX and DSNOOP - there's a third 
> one which can do what you need.

That only works if the cards are synced via word clock.

You can't send the same audio to 2 different cards, because they will
consume data at different rates, resulting in periodic xruns.

Lee