Doepfer

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

> 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

there are two trimming potentiometers on the Dark Time control board
labelled "CV1 OUT SCALE" and "CV2 OUT SCALE". They are used to adjust the
scale (1V/oct) of the corresponding output.

Best wishes
Dieter Doepfer

--- In Doepfer_a100@yahoogroups.com, <yahoo@...> wrote:
>
> > 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
> 
> there are two trimming potentiometers on the Dark Time control board
> labelled "CV1 OUT SCALE" and "CV2 OUT SCALE". They are used to adjust the
> scale (1V/oct) of the corresponding output.
> 
> Best wishes
> Dieter Doepfer
>

Thanks for the reply