[linux-audio-user] JACK of Two Cards

Eric Dantan Rzewnicki rzewnickie at rfa.org
Wed Jun 30 18:40:00 EDT 2004


On Tue, Jun 29, 2004 at 09:30:48PM -0700, Jos Laake wrote:
> Russell Hanaghan wrote:
> >Go to the "Setup" screen in Qjackctl. Under the "Interface" box,
> >highlight the existing entry, be it HW:0 or "default" or whatever. Type
> >"multi" in its place and hit ok. Then try it...
> Okay, I tried 'multi'.  Here's the error message:
> creating alsa driver ... multi|multi|1024|2|48000|4|4|nomon|swmeter|-|32bit
> ALSA lib pcm.c:1972:(snd_pcm_open_noupdate) Unknown PCM multi
> jackd: pcm.c:690: snd_pcm_nonblock: Assertion `pcm' failed.
> 21:20:53.090 JACK was stopped successfully.
> >The other was "ttable" which may have worked but I don't remember. Same
> >procedure, just highlite the entry present and type the new one in.
> And here's what I get with 'ttable':
> creating alsa driver ... 
> ttable|ttable|1024|2|48000|4|4|nomon|swmeter|-|32bit
> ALSA lib pcm.c:1972:(snd_pcm_open_noupdate) Unknown PCM ttable
> jackd: pcm.c:690: snd_pcm_nonblock: Assertion `pcm' failed.
> 21:29:33.378 JACK was stopped successfully.
> Okay, so this 'Interface' box, when you change it to something other
> than HW:0 or HW:1, I believe it's gonna try to get the configuration
> of that device from '.asoundrc'.  'ttable' is the same entry I got off
> the ALSA web site, but I never got it to function.  Do you still have
> your '.asoundrc' file?  It would probably be in your '/home/yourid'
> directory or in '/root' if you start 'qjackctl' as root.  I understand
> it could also be in '/etc/asound.conf'.
> 
> Any other alsa configuration gurus wanna chime in and help us out here?

I'm no guru and I don't understand this stuff myself, but if you
haven't already check the links here under Customising ALSA:

http://alsa.opensrc.org/

-Eric Rz.



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