26 Nov
2008
26 Nov
'08
8:03 a.m.
Am Mittwoch, 26. November 2008 schrieb Dave Phillips:
Nice unit, but there's one big trouble with it: I
get a lot of xruns
from JACK. I've Googled for solutions, tried every suggested setting,
got no joy. The only setting that works without xruns at all yields a
latency of more than 30 ms (-p 512 -n 4 -r 44100). If I lower the period
size to 256 I can get the latency down to 23.2 ms and suffer only an
occasional xrun.
In contrast to pci-devices you now have an additional stage which is the
usb-transport.
Look at the interrupts which usb-port isn't sharing its interrupt with other
devices. Then use lsusb to find out where you have to plug the device to use
that usb-port (Most times one port has two or more plugs connected to it).
Then you can try to use the rtirq-script to raise the priority of that
interrupt.
For usb (and firewire) it is usually better to use -n3 -p... which has
something to do with the way their protocols work.
Have fun,
Arnold
--
visit http://www.arnoldarts.de/
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