Setting up JACK on Fedora 12# Jan 26, 2010
Audacity is somewhat of a broken joke these days, so I needed to use Ardour to record. And that meant setting up JACK. Since JACK insists on exclusivity, I also needed to route pulseaudio through JACK so I could use other apps at the same time. Unfortunately, this is a bit of a pig to figure out. I hacked it as follows:
/etc/pulse/default.pa, you need to add two lines:
load-module module-jack-sink load-module module-jack-source
In theory now, a restart of pulseaudio should start using JACK for recording and playback, if jackd is running. However, it tends not to work very well: you might find PA hanging and you have to kill -9 it.
This isn’t enough of course, now when you log in again, gnome-session
will try to start pulseaudio, but not jackd, so nothing works. It’s far
from the right way, but I edited
is started from a
/etc/xdg/autostart/ script), as follows:
amixer -c 0 sset 'Input Source' 'Line' nohup jackd -d alsa & sleep 5 /usr/bin/pulseaudio --start "[email protected]"
Note that I have to set the input source by hand: something in desktop start up used to do this for me, but now I’m going through JACK it has to be done by hand.