Stereo

Definition

A two-channel audio format using left and right channels to create a horizontal sense of space and width. The standard format for music distribution and a foundational component of surround and immersive audio mixes.

In Simple Terms

Two channels-left and right-creating the sense of width you hear in headphones or speakers. Almost all music is delivered in stereo. It's the standard.

In Practice

A stereo mix positions instruments across the left-right field, creating a sound stage that is wider and more spatially engaging than a mono speaker can reproduce.

Sources & Verification

• →
  Blumlein, A. D.. UK Patent GB394325: Improvements in Sound-transmission, Sound-recording and Sound-reproducing systems
  1933
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  Rumsey, F.. Spatial Audio
  Focal Press, 2001
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  Streicher, R. & Everest, F. A.. The New Stereo Soundbook (3rd ed.)
  Audio Engineering Associates, 2006

Last verified: 2026-05-05

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