5.1 is a form of surround sound, which is the sound effect you get in cinemas. this is achieved by the use of multiple speakers placed in strategic positions around the viewer. Therefore to be able to enjoy surround sound you would need a surround system. Usually it would comprise of a front speaker where teh TV is, two side speakers beside the TV and various satellite speakers around teh viewing room.
the actual surround sound effect is best explained with an example:
Say ur watching Keiichi and Belldandy riding on the BMW motorcycle and they move from the right of the screen towards the left. then teh sound of bike will follow the movement ie the speakers will emit the sound from right to left, to make it sound like teh bike is really moving from one end of the screen to the other.
12-Mar-2005