[linux-audio-user] MOre realtime!

[Lars Luthman]

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
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x04C77E2E
Fingerprint: FCA7 C790 19B9 322D EB7A E1B3 4371 4650 04C7 7E2E
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20061220/45889140/attachment.pgp