[PlanetCCRMA] Using 2nd sound card for output

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Tue Nov 13 11:05:02 2007

On Tue, 2007-11-13 at 13:12 -0500, Roy Vestal wrote:
> I have FC7 with Ardour2, JACK, etc. working well. I have a Delta 1010 as 
> well as an on board AC'97. The output to the AC'97 is not showing in 
> JACK, but it works with "play wav.wav" for example. Is there a way to 
> get it so I can route the output of JACK apps (ardour2 for ex) to the AC'97?

Not really (unless you don't mind periodic clicks in the AC97 output).
If you want to use two cards they have to be in sync, that is, one has
to be a slave to the other. Otherwise the sampling rate clocks will be
slightly off and one card will output samples faster than the other and
eventually will have to skip a period so the other can catch up (ie: an
xrun or click will happen). 

Does the AC97 onboard have an sp/dif output? If so you could perhaps
slave the 1010 to it. 

-- Fernando