Came across a great little app called Tango. Allows you to control music on one Apple idevice from another. Effectively like the Spotify connect feature. Allows you to browse your music, create playlists etc. Works over wifi or Bluetooth. Not sure if it works for streaming Apple Music but is working flawlessly for playing music stored on my iPod connected to my dac/system using my iPhone. Not free but cheaper than a Bluetooth dongle I was thinking of buying.