in BasicBroadcast/ViewControllers/LiveBroadcastViewController.swift [288:296]
func broadcastSession(_ session: IVSBroadcastSession, didAddDevice descriptor: IVSDeviceDescriptor) {
print("IVSBroadcastSession did discover device \(descriptor)")
// When audio routes change (like a Bluetooth headset turning off),
// Apple will automatically switch the current route. Wait for the
// IVS SDK to catch up and then refresh the current connected devices.
session.awaitDeviceChanges {
self.refreshAttachedDevices()
}
}