For each set of speakers (front, center, rear) you can set a speaker distance (how far away they are from the listener). What does this actually do and is it worth it? I'm asking because I usually have my SR4200 set to "source direct" for my DVD player and CD player on digital inputs and the source direct option ignores these settings. I'm assuming it's just another form of digital gimmick that I should stay well away from (much like the DSP modes, which I haven't even tried yet). Michael.