How does the “surround-sound” technique work? Surround Sound which was introduced by Dolby Laboratories Inc to position sound around the audience so that the effects within movies would make them feel as though they were really there. The use of directional sound from different points in the room according to their depth, sharpness and clarity was the main goal. Starting off from a standard called Dolby Stereo, two separate channels were introduced, both left and right, so that other speakers could in turn double-up to provide a multitude of left and right channels all around the audience. The input of a effects channel