May I ask - what is connected where at the moment?
Edit! Did not see your latest post.
That means you want to watch tv (without sound) and listen to music at the same time?
Well, if that is what you want 😮
That would work!
You don't need the APE and you get a better AirPlay-receiver with the Playmaker - and if you don't need the other sources of the BeoCenter....
Only problem will be volumen control - you would have to let the Playmaker have an appropriate constant volumen level, and control the volumen via the tv and the iDevice.
MM