Stereo
From the Simple English Wikipedia, the free encyclopedia that anyone can change
Stereophonic sound, also simply called stereo, is the reproduction of sound using two or more audio loudspeakers. This creates a pleasant and natural sound heard from various directions, as in natural hearing.
The word "stereophonic" — comes from Greek stereos = "solid" and phōnē = "sound". It was coined by Western Electric.
In popular usage, stereo usually means 2-channel sound recording and sound reproduction using data two speakers. The electronic device for playing back stereo sound is often called "a stereo".