So . . . this is what happened tonight:
I started Retrologue and selected “Addicted 2 Organ”. I selected my M-Audio Fast Track Ultra as my input device, and played the crap out of the keys, waiting for it to affect the filter cutoff. Nothing. Just for feces and giggles, I then switched to the Alexis QX49 controller. Again, nothing.
Yeah, it’s a mystery - but since the problem appears to be solved, I’m not going to waste any brain cells trying to figure it out.
Thanks to all who offered assistance with this glitch! It’s why Steinberg kicks serious butt!