Setup LinuxMCE Airplay on Core
In LMCE Web Admin
Login and go to the Device tree
Click on “Create child Device” in CORE → The core/hybrid → OnScreen Orbiter
Pick the “Airplay Streamer” template (#2246)
hit “Quick Reload router” in Wizard → Restart
AirPlay should appear on your iDevice for Photos/Videos App, Music App and Youtube (for me only Youtube audio worked no Picture)
To stream audio from any app you can try to double-click the home button and swipe to the right.