BUG app blocks other app playing audio

when I open RD, the audio from my radio app stops.

Please DO NOT STEAL audio unless you actually need exclusive audio. Even when you have to emit audio, you can do so in a cooperative manner that Apple gives you some API to lower the sound of the other app and play yours briefly. In any case, you should NOT steal audio until the user establishes a connection and had explicitly wanted remote playback to local!