While I am playing a line or a chord the pitch changes. It does not matter if I am playing softly or loudly. It does not matter which keys are struck. The volume may or may not change. It is more prominent the longer it is on. I was wondering if this is just bad electronics or could it be dust. If it is dust, would it make sense to tear it open and use an air duster?
On another note, I need a key return spring. The spring has a long straight followed by coils. Any idea where to get one?
TIYA, Cheers