I know this question has been posed regarding the (non)existence of an optical digital audio out. My question is a bit different. Recently purchased the 2012 13" MBA. Little did I know, coming from a 2009 13" MBP, that the new MBAs did not have optical digital audio out. I use XBMC to play movies on my Samsung LCD TV very often. The .mkv movies that I play carry DTS or Dolby Digital. I used to use an optical cable hooked up to my MBP and connected to my Logitech Z-5500s. Digital audio would play flawlessly. Obviously, this is not possible with the MBA. My question is, with a displayport to HDMI, hooked up to my Samsung LCD TV and an optical digital audio cable hooked up to the back of my TV and that cable going to the Logitech Z-5500s, will THAT carry the digital audio signal and allow playback of DTS or DD through XBMC. I tried this method, but am only getting an obnoxiously loud static sound. However, I don't know if a setting I am using is incorrect or something of that nature. Lastly, if I were to get a true HD receiver, with HDMI inputs and output, would I then be able to get digital audio. Or does the MBA simply not carry digital audio at all. Please excuse the lengthy post as I was trying to be as clear as possible. I appreciate any and all input. Thanks!