Archive of the former Yahoo!Groups mailing list: MOTM

While attending a National Semi seminar today (Bob Pease was a riot! Had him
autograph his book)
I doodled out a mixer. Comments, please.

a) It's either 6:1 or 2 seperate 3:1 AC/DC mixers
b) in 6:1 mode, you have 2 outputs
c) in 3:1 mode, each mixer has an output
d) toggle switch that Larry torques to 400ft-lb selects the mode

now tricky stuff

e) there is only 1 MASTER level out. It is a dual pot. So, in 3:1 mode the
MASTER effects BOTH mixers
the same.

Actually, this can be sort of cool. You can still individually set the
levels (say Mixer #1 is "left" and Mixer #2 is "right")
and the with the MASTER fade them both in and out at once.

f) uses the pots found on the ADSR. I PROMISE to make the holes bigger this
time!!
g) uses OP275s as the summing amps, but a tricky OP-97 as a DC servo amp to
reduce the output
offset voltage to 25uV. This is so you can sum CV and audio with it and get
ZERO drift. As far as I know,
this has NEVER been done in any synth. Serge included.

I estimate the cost to be $130 because of the $$$ of the pots, it has 8
jacks, and the OP-97s ain't cheap.

Well??!?!?

Paul S.