ahh ok, well that's good it removes a lot of potential reasons why it doesn't work. The only additional advice I can give would be to use Graph studio http://blog.monogram.sk/janos/tools/monogram-graphstudio/ to connect to the remote graph during playback, then you might be able to find out where in the chain you are losing the HD audio. It's similar to shift+1 , but gives slightly more info.MP DOES output HD audio when using BD handler