It has been a while since I have tried to use qjackctl, but I still
run into the same problem.
I open and then start qjackctl, then I open qsampler and load a .gig
file. In connection in qjackctl I connect "32:Audigy MPU-401 #2" in
readable clients to "LinuxSampler" in writable clients. Then I press
some keys on my midi keyboard and QSampler does not pick it up. If I
connect "Vkeybd" to "LinuxSampler" and press the keys Vkeybd using my
mouse, QSampler works??? Many Thanks.