I bought the Sony BD S300(it was a killer price I couldn't pass up). I know it doesn't do the TruHD or DTS MA. I have the latest firmware upgrades. I hooked up the analog 5.1 output. It sounds AMAZING. Incredible Hulk gave me bass I've never heard from my subs before. My question is this...what is my player doing when I select the TruHD or DTSMA/HD tracks? Will it sound the exact same if I was using an optical cable? I'm still trying to understand how the sound works. What about PCM? All I know is even if it's not Tru or MA, it still sounds WAY better than my DVD's ever did. Thanks.