> I would prefer exponential bi-polar control, but such isn't
> available perhaps for technical reasons.
>
> Best regards
> Jari Jokinen
One would need a very special potentiometer with center detent, center
terminal and a resistance law that is symmetrical and logarithmic from the
center positions. I have been already asking our manufacturer if such a
potentiometer is available but they answered in the negative - sorry.