Ok, thanks Lars. I guess I'll be treating myself to an audiophile for Christmas unless anyone's got a better idea. On Wed, 20 Dec 2006, Lars Luthman wrote: > On Wed, 2006-12-20 at 10:34 +0000, J M Needham wrote: > > So I've just installed Ubuntu 6.09, and followed the instructions on > > http://fort2.xdas.com/~kor/oss2jack/install.html to install the > > realtime-lsm module and I've added > > @audio - rtprio 80 > > @audio - memlock 500000 > > > > to /etc/security/limits.conf and set the realtime mode on Jack. Seems ok, > > the only thing is that I can't get below 5.8 ms latency. Jack's behaving > > nicely with very few xruns, but won't do any better. The output of the > > messages with 32 frames for capture, for example, is: > > > > 10:41:35.039 Startup script... > > ... > > configuring for 44100Hz, period = 32 frames, buffer = 2 periods > > ALSA: cannot set period size to 32 frames for capture > > ALSA: cannot configure capture channel > > cannot load driver module alsa > > It looks like your hardware simply can't handle buffer sizes that small. > >
