Modern surround sound systems:

Today there are so many variants of surround sound in circulation that even professional audio eng ineers find it difficult to keep track of them and the various standards of multichannel audio equipment. In this article we will endeavour to give a potted history of the system followed by an overview of the latest developments and terms used in the industry, such as AC-3, Virtual Surround, MPEG, Surround 5.1, RSX3D, and associated matters