Thank you for reading this. A few other posts have touched on this but I don't believe it has been directly addressed. This inquiry is based upon the assumptions (perhaps mistaken) that (1) Apple TV has an optical audo out port, and (2) optical audio can carry surround sound signals. So... Given the fact that you cannot rip or buy a (SACD/DVDAudio) song or (5.1) movie into iTunes and maintain its surround sound capability, what is the purpose of Apple TVs optical audio-out port? Put another way, what surround/5.1/SACD/DVDAudio/whatever content can you drop on your Apple TV to begin with? Again, the answer may be that one of my above assumptions is inaccurate. If not, is Apple about to roll out a surround-friendly version of iTunes? Would surround-friendly iPods be next? I appreciate anyone's thoughts.