[sdiy] Roland JP-4 VCO

[Aaron Lanterman]

On Apr 14, 2008, at 6:09 PM, Mike I wrote:

> Hi - the Roland JP-4 VCO is a bits + pieces charge-balancing circuit  
> mostly
> built with standard CMOS and transistors ( no RC4151 converter as in  
> the
> Chroma). JP-4 has a reputation for going out of tune easily though,  
> maybe
> out of tune but with nice linearity.

I am curious about this - anyone know of JP-4 schematics on the web?  
(Quick googling didn't uncover any)

- Aaron