+1 for Jim's suggestion of Maths, but I'd hold off on getting a full size Quad VCA because the 2hp VCA is adequate until you have a larger system.
-- 33PO

And again, not to mention Optomix with its vca function on each channel...
-- Sweelinck

you can never have too many vcas!!! especially dc-coupled quad cascading ones - as they double as both audio and cv mixers - which you can also never have too many of!!!

well not totally true, but the more the merrier!!

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities