rakarrack sync tempo with jack x-run

Gustin Johnson gustin at meganerd.ca
Wed Dec 7 22:27:37 UTC 2011

hpet  is a hardware timer included on most machines since 2005

This is generally what I use.

You may also want to disable frequency scaling as I have noticed that
xruns seem to occur when the CPU changes frequencies.  There should be
an applet for that (there was under Gnome).  I use KDE which does not
seem to have such an applet, so I wrote a quick little script to
handle that.

I also assume that you meant that you have already installed and tweaked rtirq?


On Mon, Dec 5, 2011 at 3:02 PM, bart deruyter <bart.deruyter at gmail.com> wrote:
> Hi all,
> I've managed to set up my system oneiric, 64 bit to run fairly well, though
> I have noticed I still have a problem with a certain setup.
> When using two instances of rakarrack, and hydrogen, I let hydrogen run
> through one instance of rakarrack, then one input of my sound card for my
> guitar through the other instance of rakarrack.
> This works fairly well, but then I set hydrogen as sync master, and enable
> the tempo sync from rakarrack to jack and I start to get x-runs.
> Is there something I can do to improve my system apart from those on the
> linuxmusicians wiki?
> I already modified the settings for IRQ handling, and set ohci1394 (sound
> card is firewire based) as second in the list too.
> I've read something about the clocksource in the man page of jackd, but I
> don't understand what it means. clocksource cycle, hpet and system are the
> options. What does this mean, and what would be recommended. Could this flag
> in jackd improve performance?
> I already use xfce too by the way.
> grtz,
> Bart
> http://www.bartart3d.be/
> --
> Ubuntu-Studio-users mailing list
> Ubuntu-Studio-users at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users

More information about the Ubuntu-Studio-users mailing list