[sdiy] Roland DCOs

[Dave Manley]

Tom Wiltshire wrote:

> Now, the major problem with this design is that despite frequency being 
> determined by a counter value, you have to supply a CV that is 
> proportional to the frequency in order to keep the output amplitude 
> constant (IC55 Pin8 DCO1-A and IC53 Pin1 DCO2-A on the JX-8P diagram).

Using a DA for this CV is common to many DCO designs.  For another 
example that is a little more complex look at the CEM3396 datasheet, 
specifically how Vwf is generated.

http://www.synthtech.com/cem/c3396pdf.pdf

I believe the same method is used in the P-08.

-D