[sdiy] trying to understand appregiators in late 70's synths

[Magnus Danielson]

Dan Snazelle skrev:
> how do i SUM two cv sources?
> 
> is it as easy as sticking the two into a summer opamp?

Yes. Trouble is that they would become inverted, so you would have to 
follow up with an inverter, but it is not harder than a TL072 and 5 
resistors of the same value, say 10 k.

> thanks for the tips guys!

You are welcome.

Cheers,
Magnus