Hey @sam.decrock
I initially implemented it in Swift by creating brider h file in Xcode, but your comment suggested me, that maybe that’s the problem, so I recreated my code in ObjC as you can see in the updated original post - the code I pasted above is actually whole application so not much room to make mistake or overlook something…
Thanks for your suggestion, but I can’t use the participantsController in macOS version. I’m trying to mute the mic using exactly the same way as in the macOS sample code.