How to add CV control to a knob on existing module

[fredrik]

Also see:

Adding CV to existing circuits

hey friends, I am working on a project (BD++) and am wanting to add CV to a parameter usually controlled by a potentiometer. here is the existing circuit: [vactolQ1] I understand since this pot is acting as a variable resistor it can be replaced with a cv source via vactrol. Is it possible to just sum them together, pot and CV? something like: [vactrolQ] is there an easier way to do this without using vactrol? opamps?

(…while I’m deciding if I should merge these threads or not )