SergeModular

--- In SergeModular@yahoogroups.com, Peter Grenader <peter@b...>

> I can't post the schematic. But from the one I have, it sure

looks like a

> crossfader to me. Put it this way...the waveshape circuit has four

inputs.

> Sine, pulse, saw, tri - those come from the non-variable outs of

each of the

> four. All four are gated through 3080's to a summed output which

becomes

> the variable out. The four 3080's are controlled (pin 5) by a

single source

> (pot or VC input) through a series of op amps (this part of my

explanation

> is simplified). Each of the four op amps have a different ref

voltage -

> hence, they fade on at different voltage thresholds from a single

source.


That sounds like the circuit I reverse engineered from my DRISCOLL
NTO - it isn't the same thing as the Serge one. Driscoll VCOs are
very similar as far as offerend functionality is concerned, but white
different when you get down to the nitty gritty of it all.

(note - I said sounds like - I haven't seen a Serge schematic for an
NTO, though from fuzzy little photo of the sucker, there didn't
appear to be an array of 3080s.)

Ken