I have a new Macbook. I have connected it to my Samsung 750 series TV using mirror display and the picture works great but how do I get the audio to play. I fooled around with midi hdmi and nothing happened. I don't really understand MIDI anyhow. I have an Apple TV but I don't know how to get it to send material such as netflix instant to my TV it seems as if everything must come out of ITunes and that doesn't work for my situation