[sdiy] Minimoog clone

[David G. Dixon]

> You probably haven't experienced ghosting because Fatar probably worked
> out how many notes are usually held at any one time and designed the
> matrix such that ghosting would require more keys to be held.  You might
> get it to ghost by holding down a lot of keys, but then how can you tell
> ghosting from a lot of notes sounding at once?
> 
> I'm starting to move closer to a Fatar movement with a decoder circuit.
> Do you think this circuit can be made to do high-note or latest-note?  Not
> having any significant exposure to a low-note keyboard, I've come to
> depend on latest-note behaviour.  For instance, keeping a low note held
> while I play a melody on the right.  The result resembles what Chuck
> Mangione commonly produces with his horn.

I should have mentioned that the MFOS circuit is strictly monophonic.  I
can't comment on polyphonic matrix keyboards.  Building such a thing is way
beyond my modest logic-circuit abilities (and staring at the Oberheim
x-voice poly keyboard circuit has only served to scare me off...).