Peter Scheiber

Peter Scheiber was a classically trained musician and audio engineer. He was considered to be the originator of multichannel ''matrix'' audio formats, a mathematical formula used to convert four audio channels into two and back again.

Scheiber was also the inventor of the 360-degree spatial decoder. Like Lou Dorren, Scheiber was an early pioneer of multi-channel sound. It has been written that Scheiber pioneered the surround sound technology that is used in theaters today and referred to as Dolby Surround.

In matrix quadraphonic systems four channels are converted (encoded) down to two channels. These two matrixed channels are recorded onto tape or vinyl record. Reproduction occurs via a two-channel stereo transmission medium - in most cases a vinyl record - these are decoded back to four channels and reproduced via four loudspeakers. Provided by Wikipedia