[sdiy] all analog FM synthesis?

[Paul Maddox]

Dustin,

> i have been very much into FM synthesis lately and i was womdering if
> it can be done analog? what i have looked at is a design for a quad
> triangle VCO. with lin and log inputs. and one have a though on this ?

this has been discussed on here before (can't remember when), I think
someone was going to have a go at building some. The big issue, IIRC, is the
'reversing' of the output wave when the input CV goes negative.

Paul