HI! MythTV prefers AC3 track, if available. Here are more and more shows with 5.1 AC3. Problem is, if you listen to that track on normal TV (not through 5.1 amplifier), then it's much more quiet then the MP2 track. I think also 2.0 AC3 tracks are a little bit more quiet than MP2. Can I do something about that? Thanks! Thomas