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How Dolby Atmos Works

What makes Dolby Atmos unique?
Deciphering Mix Numbers
Traditional stereo mixing has been around for roughly 70 years and is known as a 2.0 mix. (Seeing a connection yet?)
Next came Surround Sound, called a 5.1 mix because of what it adds to that pair of stereo speakers: another center speaker, two more speakers in the back of the room, with the remaining ".1" indicating the one sub woofer.
7.1 Surround Sound adds additional speakers along the sides of the room.
Dolby Atmos takes this even further by adding speakers to the ceiling for a "height" channel, thereby creating a 5.1.4 mix (the ".4" being the 4 speakers in the ceiling).
Of course, many theaters may have even more speakers, but for music purposes
a 7.1.4 mix is considered Atmos standard.

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