Cgs synth

Hi, Ive got a bunch of cgs modules on the way, but ordered some PCB's
from the musicfromouterspace website for my VCA. It states in the VCA
info that it only works w/ +/-5v. I have been reading that the cgs
modules sometimes use higher voltages.

Do you think I am going to run into any issues here? will that VCA
not cut off the sound completely? If so, how do I bring that level
down? Just send it through a pot?

thanks
Scott