> hello,
>
> looking at the a107 schematics, i'd say that it's the cem3379.
> it is not only used as filter, it is also used as vca.
>
> best wishes
>
> ingo

The VCA of the CEM3379 is used as the "normal" VCA, i.e. the VCA available
with the front panel controls.

Best wishes
Dieter Doepfer