I noticed in the 'Resources' section of Tom's article a few list members websites are mentioned: Ian Fritz (VCO) Charlie Lamm (ADSR) Rene Schmitz (VCF) Yves Usson (ADSR) Ray Wilson (VCO, VCF) And suppliers Blacet Research and Synthesis Technology. Now I know why they call it NUTS and Volts (ducks). Cheers, Scott