All the voices seem to work but when playing a chord with 4 or 5 keys, one note sounds as if the filter cutoff is all the way open and is louder than the rest of the other notes. Is this enough information to diagnosis the issue? I may upload audio later.
Put it in test mode. When doing a freq/filter sweep on voice 5 with the resonance all the way up, there is no sound. Is this an indication of a failing voice chip or something else?
Which key is affected? Or is it any key within a chord?
It is voice #5 which has no sound when doing a filter sweep in test mode. The actual key/note seems random but there could be a pattern to it.