When looking through the System Setup I get the following.Fch= 12Cch= 11Sch= 8Sbw= Src =onAtt= offShould these values in which are in feet, be set according to how far that speaker is from the TV or how far that speaker is from where I sit?What are SRC and Att?Also a room where I sit 10 feet away is it considered, Small or Medium?Finally - I have wall speakers, how high from the floor should these speakers be located? TV is about 5 feet high w/stand.Thank You.