low latency USB audio broken? [was Re: [linux-audio-user] open source firewire]

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On Sun, 2004-11-28 at 17:17 -0600, Ryan Gallagher wrote:
> On Sun, 2004-11-28 at 15:51 -0500, Lee Revell wrote:
> > On Sun, 2004-11-28 at 15:35 -0500, Lee Revell wrote:
> > > Can you provide more information?  What exactly doesn't work?  What are
> > > the symptoms?
> > 
> > OK I updated the JACK bug report.  Can you (or any USB audio users)
> > repeat the test with the latest JACK and ALSA versions (preferably from
> > CVS), with both alsaplayer and jackd, at 44100 and 48000Hz?  Also please
> > try the JACK test in full duplex, capture only, and playback only mode.
> 
> Sure, glad to (though I'm not set up to do capture only).  Thanks for
> taking an interest.
> 
> The results with CVS jackd and (very recent alsa 1.0.7) on a 2.6.8.1
> kernel with volluntary-preempt are... the same as a year ago.

You can do capture only like:

   jackd -d alsa -C hw:1 ...

and playback only with:

   jackd -d alsa -P hw:1 ...

How does this sound?  It's possible that capture and playback interfere
with each other.

Lee


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