Filter / Envelope Follower Schematics

[jbv]

James Jackson :

> Hi all,
>         where can I find a scematic for a VCF with both external voltage
> input and 'front panel' pot input for cutoff and resonance. I need a schem
> that doesn't use any ICs like the CEM chips, but the obvious are fine
> (op-amps e.t.c). Accompianing notes would be useful, so I know what voltage
> the CV input is.
> Also, I need a schem for ann envelope follower.
>
> Thanks,
> James Jackson.

Elektor Formant ?

jbv