[PlanetCCRMA] usb audio, jack

Juan Reyes juanig@ccrma.Stanford.EDU
Mon Oct 4 08:58:03 2004

Hi Mark,

On older kernels like 2.4.24- I can get the two-ins, two-outs with
48K/16bit streams and MIDI on the Quattro. I have used this setup with
PD in real-time situations with few latency problems. Ecasound behavior
is  acceptable in four-channel output 44k/16bit situations. However Jack
is a different story. Although it starts with two channel configuration
few clients can handle it. Therefore I guess that for two channel ins
and outs plus MIDI the Quattro can perform ok but not many expectations.
Also "modules.conf" can be tricky because sometimes you don't want the
Quattro to be alsahw,0,0. Furthermore ".asoundrc" is a big issue while
using this box.

I have not tested the Quattro on newer and PlanetEdge kernels.

  --* Juan

On Sun, 2004-10-03 at 15:55, Mark Knecht wrote:
> hey I was wondering what sucess (or lack of) that people have been
> having with usb m audio cards.  I can't get mine to work.  Whenever I
> try to probe in alsaconf it locks up.  Is there a way I can manually
> add my card to the list of detected sound cards? also another
> question.  Will the JACK server not work until alsa is properly
> configured?  Does anyone have a similar situation with usb audio
> cards, any tricks?
> I don't use one, but I'm sure that Jack won't work if it's not
> configured properly.
> What does lsmod say? Don't know if it's appropriate, but does
> alsamixer work? Look on the Alsa site for info specific to your card.
> - Mark
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