Maybe I'm missing something…  Say I have two controllers: one with pads and one with knobs.  Is it possible to make it so the pads on controller A act as global modifiers (Shift Keys) for the knobs on controller B?
Example:
- Knob 1: Deck A Volume
 - Knob 1 + Pad 1: Deck B Volume
 
(PS — That's a very stupid example; please don't say, "Why not just assign Deck B Volume to Knob 2 instead?"  My point is that I'm trying to figure out how to use the Pads on Controller A to affect the controls on Controller B *generally*; not this very specific configuration…)
Thanks!  :-D