Telecom ABC - D
Dolby Digital is the brand name from Dolby for its 5.1 surround sound. The surround sound has 6 audio channels. Five channels with the full range of frequencies that can be heard: 3 - 20,000 Hz. These channels are: left, center, right, left surround and right surround. The sixth channel is the subwoofer. This channel is for the low frequencies from 3 - 120 Hz only.
Dolby Digital uses AC-3 for the audio compression.
Dolby Digital is also called Dolby Surround Digital or Dolby Surround AC-3.
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