Audio out USB to Bose T4S

[aeonaero]

Has anyone tried running recordings (backing tracks in my case) out USB to a Bose T4s (or other interface). I see others have used other interfaces, but I have tried both my Bose T4S mixer and a Behringer Flow 8 from my Macbook Air M1. I can see both of those mixers in the output options of Audacity when I look in there, but Bandhelp wont show them as output devices in it's audio setup.

I didn't want to bother Arlo with a ticket on this since its probably something stupid Im missing, so I was hoping someone else out there had any experience doing this. 

[arlo]

Are you trying to use the multi-route audio settings, or just using this interface as your only audio output?