Wirecast go to rendezvous with external Audio interface

hello,

I tried to use an external Audio interface (iRig) with Wirecast Go to connect to a rendezvous session, but it doesn't work. I also tried Rode SC6-L but it doesn't work either.

wirecast 14.0.4

wirecast go 2.2 iPhoneX

the idea was to use a better mic than the headset mic.

any ideas?

thanks 

Lutz