The macro is only 2 lines... ASSIGN FADER, END.
1. Go to your CC menu and select a macro register to record to.
2. Start recording.
3. (F4) insert special
4. (more) (F6) audio fader. Within the audio fader sub menu there will be clear choices. You want function=assign fader, from there you can choose the fader you want to modify and the source(s) you want to apply to that fader.
5. (F1) insert.
Thats it!
#Acuity