so i’m running the OP-1 with an ableton patch, just sending it midi notes for a drum pattern over the usb and occasionally playing additional patterns over that on the finger sequencer. trouble is, I inevitably start getting this distortion that sounds like a granular sample distortion or bitcrush of some kind. I eliminated everything else in the signal path, and it occurs evenly no matter where the volume knob is, both with the headphone jack and internal speaker. once it starts it even keeps occurring if I unplug the usb and just play it on it’s own. restarting seems to reset the problem, but it always returns.
The fact that it continues even after unplugging is unusual, but one thing to try anyway is to shut off USB powering. Shift+COM+T4 I think, then one of the knobs to disable the connection. It can be a cause of noise, ground loops and such, but not normally what you’re describing. Might as well try it out though.
That’s really weird. Could you make a video or an audio recording of it?
Nearly all of the noise issues I have encountered with the OP-1 have been down to two things.
ever find a solution? im having this same problem. i seem to have isolated it to when sequencers are being used and usb is connected to computer (with usb charging turned off). Im able to get a pretty silent noise floor from the audio out, but when i turn on some of the sequencers, that same granular feedback your describing starts coming through non stop. if i unplug the usb it stops immediately, but starts again when plugged back in. powering the op1 off and back on and then reconnecting usb seems to reset the noise but then turn a sequencer on and its back…