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What is Dolby Atmos?

Dolby Atmos is an audio format that allows sounds to be positioned and moved in a three-dimensional sound environment.

Unlike traditional surround sound, where audio is mainly distributed between fixed channels, Dolby Atmos can also use audio objects positioned at different points in the soundstage.

This makes it possible to create a more immersive sound experience.

How does it differ from normal surround sound?

In a traditional 5.1 system, sound is distributed between five main channels and one low-frequency channel.

Dolby Atmos can also reproduce sound from above.

For example, it can create the impression of rain, aircraft or other sounds moving around the room.

Do I need in-ceiling speakers?

Not necessarily.

Dolby Atmos can be reproduced in several ways:

Ceiling speakers

Speakers installed in or on the ceiling to reproduce the height channels.

Upward-firing Atmos speakers

Speakers that direct sound towards the ceiling to create the impression of sound from above through reflections.

The result is affected by factors including ceiling height, ceiling material and room layout.

A soundbar with Dolby Atmos

Some soundbars use dedicated speaker drivers and digital audio processing to create an Atmos experience.

What do 5.1.2 and 5.1.4 mean?

The last number indicates the number of height channels.

A 5.1.2 system has two height channels, while a 5.1.4 system has four.

More height channels can provide greater scope for reproducing sound movement above the listening position.

What do I need to use Dolby Atmos?

For a traditional home cinema installation, you normally need:

  • A home cinema receiver or other audio device with Dolby Atmos support.

  • A compatible speaker system.

  • Films, music or other content with Dolby Atmos.

  • A compatible connection between the audio source and audio system.

It is important that the entire signal chain supports the Atmos format being used.

Tip: Dolby Atmos does not automatically mean better sound. Speaker placement, room calibration and the quality of the audio system still have a major impact.