[ ... ] Erm, I just installed the second latest version of yoshimi. (0.028, I think). It still clicks :( I raised the latency in jack (it's on 11.6 ms again, obviously when on 5.8 ms it was completely unusable), and I forced 16-bit. Nothing. I still get loads of xruns, I don't mind the ones that occur when changing patches (it's no big deal), but it even clicks with the default sinewave :-O

Maybe, if there was a debug compile option or whatever, I could just send you the logs so you might see where the problems are.