I own a Toshiba SD9000 dvd player. It has connections on the rear panel for front center and surround,(rca). I currently have each of the channells connected to three seperate integrated amplifiers...oh, it has a sub connection which I have connected to my sub. It sounds great but does the dvd player have an on board processor that is giving me true 5.1 sound? The dvd menu has an option for six channell analog or bitstream....Which should I use. The integrated amps I am using are older vintage amps. I guess if it sounds good it doesn't matter...I'm just curious. Anyone out there know the answer to this one?? Thanks.