I guess, you are referring to these midi controls listed below. However, once I opened a midi file created with Finale in RB. All sliders start to move up and down when playback started. That explains my confusion.

But can you tell what controls Finale might have used in order to make volume sliders move in RB?

0 Bank Select
1 Modulation Wheel or Lever
2 Breath Controller
3 Undefined
4 Foot Controller
5 Portamento Time
6 Data Entry MSB
7 Channel Volume (formerly Main Volume)
8 Balance
9 Undefined
10 Pan
11 Expression Controller
12 Effect Control 1
13 Effect Control 2
12 Effect Control 1

Thank you for your time
B