I'm trying to gain more knowledge on the subject of various surround modes, as well as DSP settings, THX, DTS, and any other audio options that may be present on nice receivers. My Onkyo TX-SR502 has a variety of options, but I don't have the knowledge of all the settings to effectively utilize all of them. I want to make sure that i'm getting the best possible sounds out of my music, as well as the surround sound for movies, TV, and Playstation 2/Xbox games. I'm wondering if anyone knows of any resources that are helpful in these categories. Thanks for any help!