[sdiy] 1v/oct expo converter front end for SSM2164 quad pole vcf..

[Jean-Pierre Desrochers]

Does anybody have a schematic for a
1v/oct expo converter front end in a SSM2164 based
quad pole low pass vcf ?
Some circuits around but they seem to be with linear front end summer.
I'd need 1v/oct for the VCF span.
I found this:
http://userdisk.webry.biglobe.ne.jp/000/024/65/N000/000/000/125151002153016326829_Exp_SSM0908.PNG
But the front summer uses half of the SSM2164 as an expo converter..
The best would be to use the SSM only for the quad low pass part of the VCF..
Thanks
JP