> Hi Dieter,
> Thanks for the info.
>
> > P6/100k: frequency offset (defines the absolute filter
> frequency when the
> > VCF Frq. control is fully CCW)
>
> It was exactly how this one gets set I was particularly
> interested in, i.e. just where the overall frequency range of the
> filter ends up. Do you apply a signal of known amplitude and
> frequency, and then adjust so that the output has such-and-such
> an amplitude (hence setting the cut-off at the desired point), or what !
>
> Thanks, Tim

We use white noise as audio input signal and max. resonance setting at the
A-127. Then the filters are adjusted by ear.

Best wishes
Dieter Doepfer