Hello everyone. Over the past month I've acquired two SK-1s in various states of grime and battery leak and got them all cleaned and going. When in "normal" mode, the keyboard should have 4-note polyphony. A problem I see in both SK-1s is that the polyphony fails & it doesn't even revert to mono, worse, the note you strike fails to trigger. These SK-1s are 32 or 33 years old! Are any of you familiar with this old glitch? I feel almost baffled that it happens in both keyboards. And guess what? Sometimes the polyphony just magically works correctly. Very rarely though. Thanks!
