well I managed to poke around inside and turned the VR2 (next to the VCF chip) completely CCW. Or most might say.. I turned it all the way down.Seems to have removed the distortion entirely.I guess maybe there's too much DC being applied to the DCO signals going into the VCF chip.It definitely sounds better.. but I just wonder if I have something else going on and I'm just compensating for it./Blaine