> > The pin of JP6 can be used also to apply a voltage in the
> > range -5V...GND...+5V to adjust the relation between internal VCO and
> > external signal (GND = same level, -5V VCO only, +5V external
> signal only).
> > If a jumper is put on JP6 -5V are applied (i.e. VCO only).
>
> so what happens for a voltage of, for instance
>
> -2.5V
> +2.5V

A CV change from -5V...+5V causes a change in the relation between the
internal VCO and the external signal (voltage controller input panning).

Best wishes
Dieter Doepfer