A special mode in many surround sound systems that reproduces the effect of a center channel through a left and right stereo speaker setup. The mode is designed for users who wish to experience surround listening, such as with Dolby Surround, but who do not yet have a center speaker to reproduce the discrete center channel information. Basically the audio that would normally be sent to the center channel is added to the audio in the left and right speaker channels. This produces a mono image centered between the two speakers, almost as if a real center channel speaker were there.