These are steps I use, wonder if I can do better? If I am using outdated software etc... 1) Convert the .MKV file containing 6 channel audio using VisualHub to Apple TV 5.1 file, obtain .mov 2) Open an audio.mov file, that contains AAC track. Select EDIT>SELECT ALL, COPY 3) Open converted file .move, Select EDIT > ADD TO MOVIE (this adds a AAC audio track to the file) 4) Add this .mov to iTunes for streaming to my ATV. Step #2 and #3 have been required since previous ATV software updates when it broke the ability to play AC3 audio. I wonder if there are better ways or quicker ways to accomplish my goal of being able to watch 6 channel MKV files on ATV.