you can send CV from vcv rack through Jack and use it if you have other software that support Jack and CV or you can send it to an output to your hardware, also you can convert the CV to midi
(even you can send CV from a vcv rack instance to another through jack, I never did that but I guess could be useful to use other core of your processor )
Carla can convert CV to midi and I m sure have much more out there (perhaps this DC Voltage | Airwindows )
I dont know how it work but silent way is used to send CV to the hardware