[PlanetCCRMA] Using 2nd sound card for output

Roy Vestal rvestal at trilug.org
Thu Nov 15 10:09:01 2007

Ok, just for clarification, I cannot use the AC'97 for just output only 
from any jack software, say Ardour2 or Hydrogen, correct?  If that's the 
case, then i can live with sending the output back down my Delta 1010 ( 
I don't have S/PDIF monitors yet).

Follow up question:

How do I get my AC'97 to be used by the CD/mplayer/xmms, etc? I was in 
the studio last night and kept getting "could not find audio device" errors.

Fernando Lopez-Lezcano wrote:
> 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