According to Moog, my XL should track @ 1V/Oct from the factory, there is support to calibrate this if it it is not tracking correctly via moog support.
Not sure exactly what is carried out here...
I cannot speak for regular voyagers as mine is an XL (and believe it has the VX-351 trim calibration built into it as mentioned by MC)
I cant test it now as my studio is in bits as I am selling gear...
But yes midi will be the best bet, silent way and volta can also calibrate and do this job if you are using your modular and don't have a midi to CV converter.
A friend of mine had there minibrute delivered not calibrated correctly... I believe sonic state have video on how to calibrate it if my memory serves me well... its like the first minibrute vid they did I think. got it sorted pretty quick.