Here's a scenario for you.
I operated a huge video wall (13350x1050 composition) show in a large basketball hall (huge natural reverb!!)
The sound guy calls me the day before the show and ask my to split between the VTR background sounds (stereo) and the VTR vocals (stereo) so he can mix it the best in venue and not in the editing software. Good point!
Buuuuut. There is no option other than stereo audio in Resolume Arena.
Please please please.
Add an AUX audio to Resolume.
Add an “output sound” option in the clip properties. And let my choose the routing.
(Stereo, aux 1, aux 2,)...
That way I will be able to play two videos in same time and send more than 2 audio channels.
Sorry if my English is not perfect. Hope you got the point.
Think about it for a sec

Daniel.