AW: VCO-1C

[jhaible]

> Talking about old Korgs, is there any one besides me who like
> and use the MS20, JX3p VCA design?

I still think that it's responsible for the rather bad SNR of many Korg
Synths. I never have made tests on a MS-20 (and here the VCF probably
contributes a lot of noise, too), but I once replaced the VCA in a 
Mono/Poly with a SSM2020 VCA, and it was a *big* difference.
No more annoying hiss on low bass notes.

BTW, there's a 1-transistor and a 2-transistor version of this Korg-VCA,
and they have very different transfer courves when overdriven.
(1-transistor version is only clipping one side of the signal)

Interesting for sure, but you'd rather have the *option* of a low noise
VCA, at least.

JH.