[sdiy] What is a korg 2069AD?

[>>>marjan<<<]

the nice transformer/ps that will fit into a 1u case.
> 
> As I recall, the filter chip in the DW-8K is the same as the filter chip in
> the Poly 800 (could be wrong).  If it is, it's a very nice little thing,
> capable of self-oscillating and so on.
> 

Yes, it's Korg's custom filter chip used in Poly/EX-800 and DW range of
synths (maybe some more too). It's very nice VCF (best part of poly800!)
easily adopted to work standalone. I use it in my poly800 as ext
processor.
It has 4 pole (prob OTA) VCF, with VC resonance, 24 and 12 pole outputs,
built in VCA (in poly 800 it's used for noise level) with lin and log CV
inputs, and two input VC mixer. Very powerful processor indeed. And nice
resonance/selfoscillation. There's poly800 schem online, take the look
at
it and it's pretty straightforward. Only one pin is missing from the
schemo - it's 12db/oct out. 

-- 



marjan


me    : Marjan Urekar
e-mail: urekar.m at eunet.yu
s-diy : http://surf.to/marjansystems
music : http://go.to/forcemajeure