I'm trying to use rakarrack, which uses jackd, in F7 (yes, I know, and yes, I will upgrade it real soon now). I first used the onboard sound (intel-hda) and it worked, except that it gave terrible noises. On an older (F5) machine with a standalone sound card, there was no such problem, so I put that soundcard in the F7 box. (I disabled the onboard audio to make life simpler.) It does work for non-jackd applications, but rakarrack doesn't even seem to get any signal, as indicated by the meters.
It's not a mixer problem, because the guitar is clearly audible, it's just as if rakarrack were switched off (except that it produces some background noise).
Any idea how to debug this?
Andras