[1]I reckon the best/only way is for me to convert all my purchased songs and albums to regular
AAC Tracks from the iTunes Store are "regular" AAC, as regular as they get since the follow the official standard. My guess, and this is just a guess, is that the Xbox doesn't play standard AAC but rather only Microsoft's "bent" version, or can't handle 256kpbs AAC. You may have convert ...