> while florians idea is good, i still like the
> rotary octave switch better.
>
> best wishes
>
> ingo

I think a good compromise would be a jumper for the tune potentiometer that
defines the tuning range: ~ +/- 1/2 octave (for customers who prefer the
octave switches) or ~ +/-5 octaves or even more (for customers who prefer a
wide range for the tune control).

Best wishes
Dieter Doepfer