Ng Oon-Ee wrote: > On Tue, 2009-12-22 at 15:44 +1100, Patrick Shirkey wrote: >> Are you running the usb device at 44100 or 48000? Ideally usb cards >> should be run at 48000 with period sizes that divide perfectly into >> 48000. i.e 100, 200, 400, etc... > > Could I know more about this, please? 48000 would be the 'generally' > used (besides 96k) for USB sound cards I understand, but what's this > about period sizes? I've always thought period sizes were of the series > 8, 16, 32, 64, 128, 256... I did some experimenting with period sizes on my USB card (Behringer UCA-202 running at 48k) using jackdmp on my Debian Lenny non-RT ordinary use laptop. It was a bit better about overruns, but not much better than the 1024 (64msec latency) I usually run here on my non-RT kernel. Let's try it on musicbox (also non RT, but running regular jack). Command line reports that frames must be a power of 2: 64, 512, etc. I tried a period of 100 (worked with jackdmp). I think it's jack 0.116 on musicbox. -- David gnome@xxxxxxxxxxxxx authenticity, honesty, community _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
