Hi Ben,

> Is there a calibration for the tuning inside the module that can be
> adjusted

If you need to go to that extent, the full module set-up procedure is
described in the A-110 Service Manual, which is available on
Doepfer's website (go to th 110 module description). From memory it's
pretty straightforward: let it warm up; adjust the scale so that 1V
jumps double the frequency; set the absolute frequency so that 0V
input gives the correct pitch. There's also an adjustment for
temperature, but I think you have to temporarily de-solder something
to do it.

Tim