Hi list,

A little OT I guess, but there is a connection through the A-106
(which partly triggered my interest in this work in the first
place!). I have spent a lot of time looking at the differences
between the early and later MS20 filters, and have written a 'report':

http://mysite.wanadoo-members.co.uk/tstinchcombe/synth/MS20_study.pdf

File is about 2.25megs, with much mathematics, but some may find
something of interest in it.

Next I plan to build examples of both filters and see how the reality
ties in with the analysis (and one outcome will be to see if I
can 'tame' the resonance response in the A-106, which is rather too
much 'all or nothing' for my tastes).

Regards,
Tim
__________________________________________________________
Tim Stinchcombe

Cheltenham, Glos, UK