[linux-audio-user] Edirol UA-25: Any issues?
ce at christeck.de
Fri Nov 18 17:49:09 EST 2005
> First, try to provide a useful bug report. "The latency is horrible"
> is not much better than "it doesn't work".
you're right, sorry for that.
> Is this with JACK? Running in realtime mode? What settings? Which
> clients? How bad is the latency?
I just did my first tests with aeolus, the organ synth.
It runs on top of JACK which I run in conjunction with qjackctl.
I have a 22.214.171.124 vanilla kernel installed.
Additionally I have installed RT-LSM. The module is loaded and grants
any user access to it.
I now get much better results. I run JACK as
-R -P83 -p64 -dalsa -r48000 -p256 -n3 -D -Chw:2 -Phw:2
qjackctl tells me about 16msecs latency with these settings. No prob
playing aeolus, but I plan to pipe audio material (playing the guitar
and the bass) through my computer so less latency would be great.
I also have edited /etc/security/limits.conf as found on the web. It now
contains something like
@audio - rt_priority 95
@audio - nice -10
@audio - memlock 300000
but to be honest I have no clue which app read or use this.
I have also a program installed which reads as set_rtlimits and one
which reads as setpcaps, but to be honest, I do not know at all how
these relate to each other and how to use them.
This means that any wee small hint that gives me a starting point is
Thanks & best regards
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