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In [[broadcasting]], '''sound multiplex''' is a method to deliver alternative audio feeds on television and radio channels.
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This way, a television or radio channel can carry [[surround sound]] (like [[Stereophonic sound|stereo]] or [[5.1 surround sound]]), or alternative audio programming where an audio track in different language, alternative sports commentary, or [[audio description]] for people with [[visual impairment]] can be heard.
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