Perhaps a Doepfer A-138s as a stereo input for soft synths? They are a good price at the moment.

no, it's not an amplifier... possibly this: https://www.modulargrid.net/e/doepfer-a-183-3

EDIT: actually, it appears that I'd need an Expert Sleepers module. Is that correct? I can send cv from my Presonus Q2626, but it seems that I'd need as ES module to receive it?

no you don't need a ES module to receive it... check the voltage range though! you might want to amplify...

which DAW are you using?

"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