Open letter

[Paul Perry]

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