> From: Paul Schreiber <synth1@...>
> 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.
I like the sound of this. I do not consider the common master to be a
problem since there IS a master. The individual levels could be adjusted
on one channel if desired. could one side be AC while the other side was
DC? Would this cause the common master to be a heartache?
> f) uses the pots found on the ADSR. I PROMISE to make the holes bigger
this
> time!!
I personally liked the tight holes (don't we all)?
> 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.
If you say so Paul. This falls in that category for me of not knowing what
I want until Paul tells me <g>.
> 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??!?!?
I'll buy it.
Larry Hendry