Hi!
Which version of jack are you using? Did you try aconnect as well? also
aconnect -li and -lo to see what's heppning with the alsaseq ports.
I've used 109.2 for a long time ad nothing went wrong there. Now I use
0.112.0 and after fixing jack_connect all is well.
My favourite apps to connect MIDI and audio are LinuxSampler, fluidsynth
(no GUI) and sometimes aeolus.
Kindest regards
Julien
--------
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