> why do we found some VCA's who offer 2 CV Ins if they cannot be used to process EG + Velocity

I've wondered this too. In simplified mathematical terms, they're added together like with a mixer, not multiplied together like with another VCA. Which is all well and good, but it means you can't use it for velocities, you have to use two separate VCAs. Which is why I'd recommend having an A-132-3 instead of an A-131, given that velocity sensitivity is very expressive and pretty much necessary for making interesting music.

This is a really useful thread, thanks everyone. All this time, I'd managed to work out the two different ways of wiring up my two VCAs together for velocity sensitivity, but completely overlooked that I should have one of them set to linear mode. Whoops! No wonder the CV input of that one had to be so low and its gain so high... So you've helped me out too with this advice!

All the best,
Zoë.