Hello,
I have a problem with my voice card 8 on channel 1. Sometimes it plays normally, but sometimes the pitch goes way up like it's transposed. When I hold the key depressed it happens too. Other voice card 8 (channel 2 ) is fine.
The problem is very random - comes and goes even when the synth is warmed up.
I have checked the pitch trim pots and they seem to be ok (cleaned them just in case).
As I understand the KAS and SH boards are responsible for whole voices, not single voice cards, they are not the problem. I am slowly getting out of ideas what it might be.