Yamaha CS80

> The problem is that this will deal with the CV/Gate to the M cards, but
> there's other places that use the note data from the KAS that won't be
> updated correctly.  For example, the KBC boards use the note/octave
> codes to generate the Brilliance & Level High/Low.

Right. That keyboard scaling of the filter was quite strange for some notes.

> Of course, if you're going to do this, you'd also implement MIDI
> in/out, different voice assignment mode (low-note priority, etc), and
> lots of other stuff.  I've thought about doing this, but then I got
> better :^)

The only modification a CS-synth _really_ needs, is an _output_ for Gate
and CV signals, so you can play other synths form that wonderful keyboard.

JH.