Only one cable used for test. No USB or other midi cable on other port.

I tested 2 midi cable, I will test with more, to see. But I think this is not the problem as it is working when MD send midi to AR.

Maybe … It is very difficult to know where is the problem, because the delay is more or less big randomly.

I have midi merger from midi solutions (powered by midi not by external power supply). I can test it anyway.

I will try to go deeper in my research, if I don’t find solution I will ticket the Elektron support.

Thank for help !