How does 5.1-channel Dolby Digital differ from Dolby Surround?
The technology behind 5.1-channel Dolby Digital provides two surround channels, instead of the one from Dolby Surround, for more precise localization of sounds and a more convincing, realistic ambience. Also, Dolby Digital’s surround channels cover the entire audible range (20 Hz-20,000 Hz), whereas the range of Dolby Surround’s single surround channel is limited (100 Hz-7,000 Hz). The increased range of Dolby Digital further heightens realism and gives sound mixers more creative freedom. In addition, Dolby Digital’s multiple discrete channels enable more sharply-delineated spatial effects, and the “.1” LFE track makes it possible to reproduce low bass effects with stunning impact (twice as loud as the other channels).
5.1-channel Dolby Digital provides two surround channels to Dolby Surrounds one for more precise localization of sounds and a more convincing, realistic ambiance. Also, the surround channels cover the entire audible range (20 Hz 20,000 Hz), whereas the range of Dolby Surrounds single surround channel is limited (100 Hz 7,000 Hz). This further heightens realism and gives sound mixers more creative freedom. In addition, Dolby Digitals multiple discrete channels enable more sharply-delineated spatial effects, and its “.1” LFE track makes it possible to reproduce low bass effects with stunning impact (twice as loud as the other channels). You can also find a chart comparing Dolby Surround and Dolby Digital.
