Doepfer

I have 6 A110 VCO's and two of them are exactly one
octave lower than the other 4. They work fine, but
I have to select range '+1' to get them at the same 
pitch as the other oscillators at '0'.

Tuning works the same - ie the same position on the 
tune matches the other VCOs.

I'd like to adjust the VCO so that it has the same
octave as the others - is this possible? Anyone know
why these two oscilators would be different to regular
VCOs.

Thanks!

Ian