re. It seems to happen on one machine only... Is it possible that Qtractor uses different timers for audio and MIDI...? no, but you may try with jackd -c ... or, on your convenience, QjackCtl > Setup > Settings > Advanced > Clock source, what else? br. Reply
no, but you may try with
jackd -c
... or, on your convenience, QjackCtl > Setup > Settings > Advanced > Clock source, what else?br.