Strange. I’d try a different firmware, or embrace it.

Even though I prefer n0nx0x by a lot, one thing I really liked about MarOS was that you could vary the gate length. It didn’t sound anything like a normal 303 if you did that, but it was kind of better. Short gate times and fast sequences get you into almost Stevie Wonder clavinet sounding territory.

The stock firmware was honestly pretty underwhelming.

EDIT: hadn’t seen the followup post yet, glad you found something that worked.