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Sony Dynamic Digital Sound
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<p>Sony Dynamic Digital Sound is a <a href="/facts/Movie_theater/oSkG3tKp">cinema</a> <a href="/facts/Sound/DlKXlPuF">sound</a> system developed by <a href="/facts/Sony/7x4tCtBd">Sony</a>, in which compressed digital sound information is recorded on both outer edges of the <a href="/facts/35_mm_movie_film/rYmmvuLU">35mm film</a> release print. The system supports up to eight independent channels of sound: five front channels, two surround channels and a single sub-bass channel. The eight channel arrangement is similar to <a href="/facts/70_mm_film/AtKXcub9">large format film</a> magnetic sound formats such as <a href="/facts/Cinerama/MzYX7xDj">Cinerama</a> and <a href="/facts/Cinemiracle/CY3Ca0Lp">Cinemiracle</a>. The five front channels are useful for very large cinema auditoriums where the angular distance between center and left/right channels may be considerable. SDDS decoders provide the ability to downmix to fewer channels if required. </p>