[sdiy] AC coupling caps on MS20 clone

[David G. Dixon]

> iirc, the original PAiA 2720 synth had some capacitors in the patch bay
> that could
> be used when needed to knock out a DC offset...

Funnily enough, whilst in the shower in my room here at "Ho-Jo's" in
Roseburg, Oregon, I was envisaging a small "utility module" where one could
plug a signal in and get an AC coupled signal out.  This seems like a more
elegant solution for the problem than putting blocking caps (with or without
switches) on every module.  From what I gather, any module a
voltage-controlled gain cell (OTA or VCA) can suffer from this problem, but
one wouldn't expect to find blocking caps on all these modules.  Indeed,
putting them on a VCA would be quite useless (unless, like Buchla, one made
a strict separation between CV signals and audio signals -- a philosophy to
which I object vociferously).