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SDDS 8-Channels; this logo is used when all 8 channels are used as opposed to the usual six. While most major studios eventually began putting SDDS tracks on their releases, most independent films only came with Dolby Digital tracks, leaving many SDDS-equipped, or DTS theaters playing analog sound in otherwise state-of-the-art auditoriums.
This is a list of films encoded in the SDDS sound format with eight channels of sound, rather than the usual six. The first film to use this format was Last Action Hero (1993), [ 1 ] and the last was Surf's Up (2007).
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DTS-HD Master Audio is selected as an optional surround sound format for Blu-ray, where it has been limited to a maximum of 8 discrete channels. DTS-HD MA supports variable bit rates up to 24.5 Mbit/s, with up to 6 channels encoded at up to 192 kHz or 8 channels and nine objects encoded at 96 kHz/24 bit. If more than two channels are used, a ...
A two-channel audio signal is recorded as a pair of lines running parallel with the film's direction of travel through the projector's screen. The lines change area (grow broader or narrower) depending on the magnitude of the signal. The projector shines light from a small lamp, called an exciter, through a perpendicular slit onto the film.
The stereo optical sound strip is located on the right, with waveforms for left and right channels. To the far left is the SDDS digital track (blue area to the left of the sprocket holes), then the Dolby Digital (grey area between the sprocket holes labeled with the Dolby "Double-D" logo in the middle), and to the right of the analog optical ...
Not all films with CDS soundtracks used all 5.1 channels; some, such as Edward Scissorhands (1990), used only the 4 channels that were supported by Dolby Stereo. Universal Soldier (1992) was the last film encoded with CDS. The digital information was printed on the film, similar to Dolby Digital and SDDS. However, unlike those formats, there ...
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