Open letter

[Gene Zumchak]

Paul,

    As I mentioned a couple of days ago, the Sonic V (MuSonics of Buffalo, later
to merge with R.A. Moog Company to become Moog Music) used the diode ladder.  I
don't think anyone used it earlier.

Gene



Paul Perry wrote:

> At 09:41 AM 9/04/99 -0700, Sean Costello  wrote:
>
> >differences. Besides, there were several other synths that used the
> >diode ladder, so EMS can't claim ownership. Especially since all of the
> >diode ladder circuits were taking advantage of a loophole in the Moog
> >patent.
>
> I doubt EMS ever had any patents..
> What I wonder, is who was the first to do the diode ladder?
> EMS was pretty early.
> And what is more mystifying, is why nobody made a state variable filter with a
> multiplier as the active voltage control element. I think the technology
> was aroundat the time, in analog computers.
>
> paul perry melbourne australia