Here is my setup Panasonic RV31 DVD player Optical Digital Connection Denon 2801 Definitive Technology Pro Cinema Speakers I was going through the setup menus for my dvd player and I found a few setting that I dont know what they do. I've even experimented with them but no luck. PCM Down Conversion - Default is off. My manual sucks and I'm not sure if this should be on or off. Dynamic Range Compression - The manual says that this should be turned on for late-night viewing. What ever the heck that means? If it matters, I use my dvd player for movies, cds, and mp3 cds. If any of these setting improve surround sound, let me know. My biggest joy is any time I hear back speaker effects. THANKS in advance!!!!!!!!!!