Stereophonic sound
From The Art and Popular Culture Encyclopedia
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Stereophonic sound, commonly called stereo, is the reproduction of sound, using two or more independent audio channels, through a symmetrical configuration of loudspeakers, in such a way as to create a pleasant and natural impression of sound heard from various directions, as in natural hearing. It is often contrasted with monophonic (or "monaural", or just mono) sound, where audio is in the form of one channel, often centered in the sound field (analogous to a visual field).
The small record label Audio Fidelity Records released the first mass-produced stereophonic disc in November 1957. Sidney Frey, founder and president, had Westrex (owners of one of the two rival stereo disk-cutting systems) cut a disk for release before any of the major record labels.
