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Dark TIme CV1 output vs CV2 output tuning discrepancy with A-110

2013-05-28 by sm.ms@virgin.net

Hi

Can anyone help me please with the following issue?

I am using a dark time with an A-100 system.

I find that the tuning produced by CV 2 output is different (slightly flat) when compared to the tuning produced by CV1.
My 3 A-110 VCO's can be adjusted to be in tune with a midi keyboard and with each other such that when they are keyed via midi everything is in tune.

If I connect the CV1 output to any/all of the A-110 VCO's then again everything is still in tune and no further adjustments are required.
However if I connect CV2 from the dark time to a A-110 VCO then the tuning is flat and no adjustment of the second row of  "knobs" of the dark time will make it in tune with a VCO connected to the CV1 output. Any adjustment is either slightly flat or slightly sharp.

Now I know that I could just retune the VCO or VCO's that I use with the CV2 output but that means when I want to play the A-100 from a midi keyboard I have to retune those VCO's that have been used with the CV2 output.
Is there a trimming pot on the Dark Time PCB that allows for fine tuning of the CV output?

Thanks

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