[sdiy] doepfer a107 cem3372 oberheim expander filter

[Stefan]

Hello everyone,

I was wondering if anyone would have some sort of schematic of the
doepfer a 107 filter. see: http://www.doepfer.de/a107.htm
I first wanted to clone the oberheim matrix\expander filter and then 
found out
that it was apparently possible to make even more filter types out of 
the cem3372.
Since i'm not very knowledgeble regarding filter design, i need some 
help to find out how.

kind regards,

Stefan