If i buy a midi/usb to CV module it would fix the problem , no ?In most cases, at least where it's challenging, "voltage controlled" really means exponential voltage control at 1V/Oct. The problem here is that there are usually quite a few details about getting the voltage control tuned correctly, exponential converters can be fussy beasts. Sure, you can just build stuff off of the web, but, expect to have many more problems with scaling, range, and general accuracy with voltage controlled stuff.
I' d like to buy my own modular system because i have a few hardware synth (the arturia microbrute especially) and i feel really excited when it come to design sound , it do something i can't do with plugin , the sound is just better than every plugin.
I play a lot with modular from softube , and i'm very close to the same feeling of excitation that i have with hardware synth.But i want more....