[sdiy] Later MS-20 filter with 2164

[David G. Dixon]

> > I haven't used any discrete transistors; only 2164s.  And, as mentioned
> > above, I will not be reproducing the output circuitry of KLM-307.
> 
> That's what I assumed. I meant that the reference MS-20 should have the
> output tapped directly from filter output instead of regular audio out (as
> MS-20 seems to lack filter output jack).

I have a feeling that the raw output of the MS-20 filter requires
amplification to be useful as an audio source.  It's also too bad that the
HPF cannot be tapped directly from the MS-20 (except by cranking the LPF
cutoff all the way up and resonance all the way down, of course).  It might
be nice to be able to mix the two outputs together.