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No matter how many channels they use, they cannot duplicate the free movement of sounds that gives Dolby Atmos its unique realism. Other home theater audio technologies, even those that add height information, still rely on channels and do not create audio objects. Overhead sounds can be produced by either overhead speakers or special Dolby Atmos enabled speakers that fire sound up to the ceiling, where it is reflected back down as overhead sound. The technology also enables overhead sounds that enhance realism and make the sound more expansive. You can have up to 24 speakers on the floor and 10 overhead.
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You can play a Dolby Atmos movie and get the spatial effects on nearly any speaker configuration in a home Dolby Atmos system, and adding speakers increases the precision of the audio placement.
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A Dolby Atmos powered AVR reads the metadata and determines how to use the speakers in your specific setup to best recreate this precise placement and movement. No More Channel Dependencyĭescriptive metadata accompanies every Dolby Atmos soundtrack, specifying the exact placement and movement of the audio objects. Content mastered for home reproduction includes all the audio objects from the original film, placed in three-dimensional space, just as in the cinema. These include stationary sounds that are reproduced through all the speakers, such as a music background or ambient effects. You will experience a soundtrack as you would in a real-world environment.ĭolby Atmos supports up to 128 simultaneous audio objects. Audio objects originate and move anywhere in three-dimensional space, including anywhere overhead. With Dolby Atmos, filmmakers simply determine where the sound should be located within a scene, and the system intelligently makes the speaker-assignment decisions. For channel-based audio, filmmakers must determine which speakers should reproduce which sounds, an approach that could compromise the artistic intent. This approach allows the filmmakers to focus on the story. A child shouting, a helicopter lifting off, a blaring car horn-the filmmaker can decide exactly where the sound should originate and where it should move as the scene develops. Any sound can be mixed as a single audio element, an object, that's independently placed in three-dimensional space. How Dolby Atmos Works Its Magic Audio Objects Take Flightĭolby Atmos is based on the concept of audio objects. You'll feel like you're inside the action, in ways you've never before experienced.
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Through the use of audio objects, overhead sound, and all the richness, clarity, and power of Dolby sound, Dolby Atmos turns your room into an amazing place for entertainment. They can be precisely placed and moved anywhere in your room, including overhead, to flow above and around you in three-dimensional space.
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In Dolby Atmos, any sound-the helicopter, a car screeching around a corner, a melodic bird call-can exist as an independent audio object, free of channel restrictions. It's the first cinematic audio format in which sounds exist as individual entities, called audio objects. You hear it only from the small number of predetermined locations defined by the speaker setup, not as you'd hear it in real life.ĭolby Atmos, by contrast, frees sound from channels. While that helicopter can move across channels, it can't go above you. If a scene requires, say, a helicopter taking off, that sound has to be assigned to specific channels and mixed together with other sounds.
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Traditional surround soundtracks must confine all sounds to the 5.1 or 7.1 channels of a typical home theater setup. Freeing Sound from Channels-the Dolby Atmos Concept