Question 1

What is immersive sound in cinema and how does it work?

Accepted Answer

Immersive audio uses an object-based sound model instead of traditional fixed channels. Sound objects - for example an airplane flying overhead or a whisper coming from a specific spot in the auditorium - are stored in the recording as three-dimensional points in space, and the playback system dynamically maps them to the available speakers. The result is a convincing three-dimensional soundscape that adapts to the size and configuration of each auditorium. The most widely adopted standards in cinema are Dolby Atmos and Auro 3D.

Question 2

What is the difference between Dolby Atmos and Auro 3D?

Accepted Answer

Dolby Atmos and Auro 3D are two different approaches to immersive sound. Dolby Atmos uses an object-based sound model supplemented by overhead speakers that create a vertical dimension. Auro 3D (AuroMax) adds a second layer of speakers at height above the standard horizontal plane, with an optional third layer at the zenith. Both systems are DCI-compatible and can be installed in new or existing auditoriums. The choice depends on available content, auditorium dimensions, and budget.

Question 3

How many speaker channels does a cinema need for modern immersive sound?

Accepted Answer

The minimum configuration for immersive sound adds overhead speakers to a standard surround system (5.1 or 7.1) to provide the vertical dimension. The number of overhead speakers required for a standard Dolby Atmos cinema installation depends on the size of the auditorium. We always design the exact channel count and speaker layout individually after an acoustic analysis of the room. As a general rule, a larger auditorium with more seats requires more speakers for uniform coverage.

Question 4

Is it possible to retrofit immersive sound into an existing cinema?

Accepted Answer

Yes, upgrading an existing cinema to immersive sound is technically feasible. It requires installing additional speakers (overhead, height, surround), replacing or supplementing audio processors and cabling, and possibly making acoustic modifications to the auditorium. The scope of work depends on the existing installation, room dimensions, and the target standard. XC TECH carries out complete turnkey audio upgrades, including acoustic measurement and post-installation calibration.

Question 5

What is a digital audio processor in a cinema and what does it do?

Accepted Answer

A digital audio processor (DAP) is the central element of the cinema sound chain. It receives the digital audio track from the DCI server, decodes it (Dolby, Auro, Datasat, and similar formats), applies corrections, and distributes the signal to the individual speaker zones. The quality and feature set of the processor directly determines the sound result in the auditorium. Modern processors support remote management, fast switching between configurations for different formats, and real-time diagnostics.

Question 6

How is the sound system in a cinema calibrated?

Accepted Answer

Cinema sound system calibration is performed using measurement microphones and specialized software. The technician measures the acoustic properties of the auditorium, then sets speaker delay (time alignment), equalization, and volume levels so that the sound at every seat meets DCI standards. Proper calibration is essential for accurate playback of audio tracks and must be repeated after any major change to the installation or a room renovation.

Question 7

What is the recommended listening level and how does a cinema control it?

Accepted Answer

The DCI specification defines the reference listening level for a cinema (the so-called cinema reference level, expressed in decibels). This level is set by the calibration technician and stored in the audio processor. The projectionist may use this reference level for regular playback or adjust it within the permitted tolerance. A level that is too low degrades the experience; a level that is too high can damage hearing and shorten speaker lifespan. A correctly configured and calibrated system delivers the best result for every type of content.

Audio

THE BEST SOUND SYSTEMS FOR DIGITAL CINEMA

Products

Kinoserver Barco mFusion ICMP-XS s integrovaným audio procesorem

Barco APX AuroMax - Immersive Sound SMPTE 2098-2

Barco Smart Amplifier

Datasat AP20 - Sound Processor for DCI Cinema

Dolby - Sound Processors for DCI Cinemas

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