[Ardour-Dev] Jack server problem

[Sampo Savolainen]

On Sun, Mar 20, 2011 at 7:07 PM, Fábio Magnoni <fabiohmagnoni at gmail.com>wrote:

> Yeah, that was the problem. Thank you!
>
> But... another problem kkkk
>
> When I start Ardour3, create a project, and click apply, it closes with
> this message
>
> "JACK is running in realtime mode, but you are not allowed to use realtime
> scheduling.
>
> After applying these changes, please re-login in order for them to take
> effect.
>
> You don't appear to have a sane system configuration. It is very likely
> that you
> encounter xruns. Please apply all the above mentioned changes and start
> jack again!"
>
>
Your system doesn't allow you to run realtime processes. There is
information on how to configure this on http://jackaudio.org/ (more
specifically http://jackaudio.org/linux_rt_config).

The other thing is that you need to test is which audio parameters work best
for you. Unfortunately the specific setup is system-specific, so you just
have to try out a few different values. I suggest you install qjackctl and
use that to configure jack. The important two variables are Frames/Period
and Periods/Buffer. A typical internal soundcard usually works fine with 512
and 3. Other common values for these are 256 or 1024 for the first and 2 for
the second.


  Sampo
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