Dolby Digital Motion Pictures

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In 1877, Thomas Edison was working on a machine that would transcribe telegraphic messages through indentations on paper tape which could later be sent over the telegraph repeatedly. Because of this, Edison speculated that a telephone message could also be recorded in a similar way. Edison made a sketch of his desired machine and gave it to his mechanic, John Kruesi, to then build. After Kruesi built the machine now known as a Phonograph, in a supposed 30-odd hours, Edison immediately tested out this machine by speaking into the mouthpiece, "Mary had a little lamb." When the machine played his words back to him, Edison knew he was onto something groundbreaking. The Phonograph The invention of recorded sound predated the successful demonstration of motion pictures by nearly 20 years. Edison's 'Kinetoscope' was arguably the first successful motion picture system, which was developed from 1889 through 1892. The sound…show more content…
Like Dolby Digital, DTS is a digital 5.1 channel system. Unlike Dolby Digital, however, DTS records the audio channels on CD, which on playback is synchronized to the film's time code. The first DTS movie was 1993's Jurassic Park. Jurassic Park (1993) In 1993 Sony developed the Sony Dynamic Digital Sound (SDDS). The SDDS is an optical system like Dolby Digital, but with 7.1 channels arranged in a unique pattern - five front channels (left, left center, center, right center, right), left and right surrounds, and the low frequency effects (subwoofer) channel. This multiple-front speaker system produces better dialogue imaging with the first SDDS film being 1993's The Last Action Hero. In 1999, Dolby introduced yet another new surround sound technology, Dolby Digital Surround EX. This 6.1-channel optical system adds a rear surround channel to the previous left and right surrounds. The first EX movie was Star Wars: Episode One - The Phantom

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