Why would anyone use this audio option? I do not have my L or R surr.speakers hooked up yet & I wanted to watch the movie 4 brothers.I went into the dvds audio options & selected the 2.0 audio option.I did not notice a change in sound.It was like listening to a movie on tv without using my Keenwood VR-615 HT 5.1 system.Why would anyone use the 2.0 sound option? :confused: