I notice sound on the comp isnt as rich compared to say my dvd player. The way bass is used is different for isntance. I also noticed that quicktime handle bass better then windows media player, or atleast with the samples I tried. I noticed there was some bass material that showed up using quicktime but never showed up in windows media player. I never could figure out if it was the compression or the players or the soundcard that was taking some oomph away from surround sound as well. I have dolby digital and dts trailers, I figure they use the same bitrate dvd is and yet their lacking, on a small scale of course, only people like us would really be able to pick that stuff out but it bothers the heck out of me. I think my soundcard is doing the processing before it gets to my reciever instead of letting it go right through to the reciever. I heard that's not wanted but for the life of I can't figure out any kind of way to do that in the players or in my soundcard control panel.