[LAU] realtime kernel on ubuntu 8.04

[hollunder at gmx.at]

On Wed, 03 Sep 2008 17:33:50 +0200
Atte André Jensen <atte.jensen at gmail.com> wrote:

> Matthew Smith wrote:
> 
> >  From what I was told when investigating my problem, the Intel HD
> > audio drivers (snd_hda_intel) can cause problems.
> 
> I see.
> 
> > I use an external USB soundcard - the Behringer UCA202.  These are
> > quite inexpensive and have the added benefit of having RCA
> > connectors rather than those horrible little 3.5mm jacks for the
> > main in/out connections.
> 
> I tried my edirol usb soundcard, and that seemsto run glitch-free at 
> 17ms (but no lower). Is that as low as usb goes or should I be able
> to improve that?
> 

Hi,
I use an edirol UA-25, and it can go lower, however, USB is rather
limited. I don't use it below 128 frames/period (~8ms).
64 frames/period (~4ms)seems to be the lowest working setting but I
don't recommend it. All values as reported by qjackctl, so it's
'roundtrip-latency' I guess.

Best Regards
	Philipp