[sdiy] CEM3372 passband gain trick?

[David G Dixon]

> > P.S. What does "VCF Uses Open Loop Design for Enhanced 
> Sound Richness" mean?
> 
> Probably means that instead of using (the equivalent of) an 
> opamp with capacitor feedback, they use (the equivalent of) a 
> buffer followed by an RC filter with controllable resistance 
> in each filter stage.

Why would they be any different?  They both give the same transfer function.