[sdiy] help finding roland filter schematics?

[Dan Snazelle]

hey there

in my quest to better understand OTA filters, i have been trying to find some of the old roland OTA filter schematics
in readable scans.

i found this CHART which lists which of the roland filters use regular OTA's.

http://fa.utfs.org/diy/roland_filters/index.html


so i am looking for readable SCHEMATICS of the SH1, SH2, SH7, and maybe sh09

also...these are probrably good ones to look at in general for vco and lfo ideas,etc.

a few questions...does anyone know how much a BA662 compares to a ca3080?

also...in the later ROLAND OTA CHIPS are these basically just 4 otas on a chip? or is there something fancier going on? are these available as schematics anywhere?

Thanks SO MUCH!!






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