[sdiy] Oberheim Xpander Multimode VCF Question

[Steven Cook]

Thanks for this link, Tom - very interesting I've already got the schematic 
for the VCF section itself but not the accompanying theoretical explanation. 
If only I actually understood it!

Steven Cook.
http://www.spcplugins.com/
+44(0)1271 867288

> The best source is the Xpander Service Manual, which has some detail  on 
> the filter, including the basic equation:
>
> http://www.synthi.se/oberheim/OberheimXpander-ServiceManual.pdf
>
> If you've not seen this already, you should definitely have a look, 
> Steven.