[sdiy] Korg MS-20 filter

[Antti Huovilainen]

Hi

I need an "official" reference to the Korg MS-20 filter (schematic) for
university stuff. I've used Rene Schmitz's schematics, but I assume MS-20
filter schematic (the later version) has been published ages ago
somewhere. Question goes: Where?

Also, I remember seeing a schematic of MS-20 filter with highpass mode
too, but I have no recollection where. Can someone point me to such
schematic?

Antti

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