S. Massy wrote:
On Fri, Sep 16, 2011 at 02:11:35PM -0400, Paul Davis wrote:
On Fri, Sep 16, 2011 at 2:02 PM, S. Massy <lists@xxxxxxxxxxxx> wrote:
On Fri, Sep 16, 2011 at 01:33:42PM -0400, Paul Davis wrote:
if you can run a USB 1 class compliant audio device on your linux
system with lower latency than the current minimum so far posted to
this thread, please post with the settings you use and the type of
device. if your best performance has already been posted, no need to
repeat it.
i'll get the ball rolling with 2048 frames. note that we are assuming
2 channels only, but duplex mode (simultaneous capture+playback).
Pardon my obtuseness, but... Well, are we talking frames per period, as
in the -p option in jack's audio driver?
in JACK terms, the combination of:
* sample rate
* period size (frames per period)
* number of periods (periods per buffer)
With my Roland UA25EX I can run JACK with -r48000 -p64 -n3 without any
xruns or stability issue. Anything lower gets dicey.
64 msec latency is best I can do with my UCA202, -r48000 -p1024 -n3, but
not 2-way (that's playback only), on non-RT kernel. Recording doesn't
work through JACK at the moment, error message says something about
impossible sample size.
--
David
gnome@xxxxxxxxxxxxx
authenticity, honesty, community
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