*"Dolby" and the double-D symbol are trademarks of Dolby Laboratories.
*"DTS" and the dts symbol are trademarks of DTS - Digital Theater Systems, Inc.
This sound option was originally used from the first time TV and RADIO was available
It consists of all the sound channels mixed into one
so every sound comes from a single speaker usually mounted in the side of an old fashion television set
as far as for use in the modern day home sound system it's all but debunked know with the introduction of stereo audio sound