Currently Being ModeratedAug 24, 2012 9:35 AM (in response to christophe k campagne)
Mountain Lion now provides Airplay as a new Output Audio Device. If you have an AppleTV it sould be aviable right there.
In the "Audio MIDI Setup" utility, select the destination for Airport (if you have more possible devices)
Select Airport in Logics Output Device Preferences Window
You could even create an Aggregate Devie or a Multi Output Device (also new in Mountain Lion) to combine your Audio Interface and Airplay, to send Audio alternatevly or simultaniously to your Studio and the recording room (or living room)
No need to fuzz around with AUNetSend anymore
Currently Being ModeratedNov 21, 2012 8:13 AM (in response to Edgar)
Unfortunately it doesn't seem to work like that for me. I can see the Airport device but can't select it, with it always returning back to the Built-in option. Very odd as I can see, and play to, that same device (the PC running my TV). from iTunes.
Currently Being ModeratedNov 22, 2012 3:04 AM (in response to CCTM)
Got it working. If the device is up and running before you start Mountain Lion, it can see it and play to it. If you start the Airplay device up while Mountain Lion is running you can see it but can't connect to it. Restarting Mountain Lion solved the problem. Looks like a bug fix is needed.