i am trying to get some of my new videos that have 5.1 surround sound to play on my 1st gen Apple TV and i can't seem to get the audio right. i was wondering if i could get some help. i would like the audio to have the surround sound for my onkyo surround sound 7.1 (set up with only 5.1 right now) receiver and it would be nice to have it work on my iMac that does not have surround sound as well. so my question is what do i set the audio settings for to get this to work. it seems like on certain settings i don't get any sound and on other settings i dont get surround sound. i've been checking to see if the file that is encoded has surround sound by using a program called videospec on the mac and its telling me that the audio is only 2.0 stereo. i've tried so many settings i cant remember them all. please help!!