by the way, I noticed that recording audio from usb is somehow much worse than using an external audio interface. Always getting a lot of glitches and crackles with any buffer size - not so much latency. so now what I do is activate midi out sync from Ableton and recording using ext. input and monitoring off. I’m able to lower the buffer to 64 or 32 with no problems and the M:C starts automatically whenever I press record on Ableton. I might end up removing those couple of ms of latency anyway though.