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Generate true 5.1 channel surround sound output
Authored by: jaysoffian on Feb 18, '09 02:55:20PM
Also, some video content from the iTunes Store now has both a stereo AAC track and a 5.1 AC3 track. For example, I opened an HD episode of Lost from the iTunes Store in QuickTtime Player and noted the following tracks:

Name          Format
------------  -------------------
Main Program  AVC0 Media
Stereo        AAC (protected)
Surround      AC3 (protected)
Clicking on the AAC track, then Audio Settings shows two tracks (left and right). Clicking on the AC3 track, then Audio Settings shows all 5.1 tracks. Playing this on an AppleTV hooked up to a DD receiver would result in proper 5.1 surround sound. Renting movies on the AppleTV, you are also informed when movies contain 5.1 surround sound at the time of the rental.

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