Currently Being ModeratedJan 30, 2013 4:20 AM (in response to jenine4306)
Welcome to the Apple community.
Is this question about airplay, or is it the case that your Apple TV is not playing any audio when it plays any content.
The reason I ask is that airplay from your Mac requires OS X 10.8 and your profile states that you are using OS X 10.7. Would you please clarify your question.
Currently Being ModeratedJan 30, 2013 2:00 PM (in response to Winston Churchill)
This question is mainly about playing through my Apple Tv. The picture works but the audio does not. I know my TV sound works because I've obviously tried it watching normal tv. I have looked in all the places I can think of for Sound Preferences but can't work it out. The only reason I am extremely confused is everything was working fine a few days ago - and now the sound doesn't work.
Currently Being ModeratedJan 30, 2013 2:12 PM (in response to jenine4306)
Have you tried adjusting the "Audio Out" and the "Dolby Digital" settings in settings > audio and video? It may be worth trying several combinations of these settings, although typically it is the "Dolby Digital" setting that causes most problems for users.