Dolby Digital

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Dolby Digital is the name for data and audio compression technologies developed by Dolby Laboratories. It was originally called Dolby Stereo Digital until 1994.



Dolby Digital[1] has similar technologies, included in Dolby Digital EX,[2] Dolby Digital Live,[3] Dolby Digital Plus,[4] Dolby Digital Surround EX,[5] Dolby Digital Recording,[6] Dolby Digital Cinema,[7] Dolby Digital Stereo Creator[8] and Dolby Digital 5.1 Creator.[9]

Dolby Digital

Dolby Digital is the common version containing up to six discrete channels of sound. The most elaborate mode in common usage involves five channels for normal-range speakers (20 Hz – 20,000 Hz) (right front, center, left front, rear right, rear left) and one channel (20 Hz – 120 Hz allotted audio) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported. AC-3 supports audio sample-rates up to 48 kHz. Batman Returns was the first film to use Dolby Digital technology when it premiered in theaters in Summer 1992. The Laserdisc version of Clear and Present Danger featured the first Home theater Dolby Digital mix in 1995.

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