I have the Sony DVA S300 DVD Home Theater System. When I play DVDs, VCDs, or CDs the sound, of course, comes through the system speakers - no problem. However, I would like the option of having the sound from normal tv shows/movies to go through the system speakers also (rather than just the tv speakers). How do I do that? I seem to remember that the folks who set my system up were able to get the sound from tv movies/shows to go through the DVD system speakers, but only certain channels. Will only certain channels or movies have the ability to go through my system speakers? What buttons do I push on my remote control to make this happen? Thanks!