I got my collection of synth chips out last wekend tested 'em all and found I have a few I could trade or sell. 2 CEM3310 ADSRs 1 CEM3320 VCF 1 SSM2030 VCO They are $30 each or... I will swap any 1 ic I have for 1 CEM3340 VCO. I will swap any 1 ic I have for 2 CEM3374 VCO. I have 1 CEM3372 VCM/VCF/VCA I will swap for a CEM3340 only. -Tom