Hi, In the Preferences of Subler there is an option to "DOWN MIX AUDIO TO...". Does this automatically change any video file opened in in Subler? I have the movie 3:10 To Yuma (2007), which I purchased from iTunes, on both my AppleTV and iTunes Library. I open the file in Subler to see if I could add chapter markers, but I closed it again without making any changes. I was just now syncing another movie to AppleTV and 3:10 To Yuma automatically begin to sync - this means there was a change in the file doesn't it? The "DOWN MIX AUDIO TO" drop box is set on Dolby Pro Logic II. Have I altered the purchased files audio?