No sound on TV when using Airplay
I have tried turning on Apple TV before I choose Airplay and I have also tried changing sound from computer to TV in settings, no luck with either I still have no sound. In settings - sound I can not change from Internal speakers to Apple TV. Any suggestions please? (This only happened after i did updates)
MacBook Air (11-INCH, MID 2011), OS X Mountain Lion (10.8.2)