Discussion about the Korg PolySix synthesizer

OK...

If it's sharp to start with and then improves once it's warmed up, I'm 
familiar with that kind of fault as well.
Has your Poly Six been battery damaged at some point?
I've got a clients Poly 61 that suffered extensive battery damage. The 
thing is completely mad for about the first hour, and then after that it 
starts behaving OK.
I've removed a few ICs on the CPU board and cleaned the PCB under them 
with lots of IPA (Isopropyl Alcohol) which seemed to improve certain 
aspects of the issues, but I've not managed to get rid of all them.
Might be a residue issue.