Korg Mono/Poly

Hello Nick,

I am sorry to tell you this, but this does not sound good. To me it 
sounds like a broken filter chip. Appearently the filter dose nto work 
as it sould do: The example
> Polyphonic mode,  triangles with resonance fully up:
> http://www.guitaraustralia.com/MonoPoly/trianglePOLY_resUp.mp3 206KB
shows no resonance at all, but feeds through some portion of the input 
signal to the output.

Does the filter basically work? What happens if you turn the cutoff 
frequency potentiometer full counter clockwise?

You might check, whether the SSM 2044 on the filter board is socketed 
and perhaps the chips got loose in the socket and needs to be reseated. 
If the chip is soldered direct to the pcb I think it is broken at all.

Florian