The user interface for selecting alternate audio and subtitles on the Apple TV is laughably rough, but it works. Hold down the select button, scroll to the top, then scroll right and you can access these features if they are present. Let’s hope Apple improves this in future iOS versions!
AAC
How to Legitimize and Upgrade Your Music Library Using iTunes Match
Although delivered a month late, Apple has finally shipped the complete cloud integrated version of iTunes. This includes iTunes Match, a much awaited feature allowing both online streaming of music and “upgrading†library content from the iTunes Store. Here’s how to upgrade your old low bit rate MP3 files with high quality 256 bit AAC replacements from Apple’s server.