[linux-audio-user] MOre realtime!

Lars Luthman lars.luthman at gmail.com
Wed Dec 20 06:40:53 EST 2006

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.

Lars Luthman - please encrypt any email sent to me if possible
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