Thanks for your reply Neil.

I agree that its 1V/Oct. The problem is that it looks like there is an 'offset' of minus one semitone. If that is possible anyway. Maybe Dieter can confirm or deny this

The CV Out of the A-156 goes directly to my VCO. I've measured the input signal for the Transpose CV with a multimeter and it's exactly 1.00, 2.00 and 3.00 volt resp.

For the time being I've made a workaround by feeding the CV Out of the quantizer and Transpose signal from my keyboard to a mixer before it enters the vco.

Best regards,

Karel.