About a month ago all my voices seemed to be non working. When doing a maximum volume through a preamp I heard a small crackling sound with the sound of the synth underneath. After trying things like resetting the synth, calibrating (which all resulted in timeout errors) I gave up for the night and turned it off. When I woke up in the morning everything was back to normal. I assumed it had something to do with the synth cooling of for the night and decided to not give it any more thoughts.
Now this has happened again, except I can't fix it by cooling it off. I now tried listening with headphones and I can hear the synth through this crackling noise but the phones volume button doesn't work. It's stuck at this weird low volume no matter what the phone settings is at. Again with maximum preamp I can hear the similar synth/crackling through my main outs.
No calibration works (timeout errors)
Any idea what might be wrong?