ADM BWF Dolby Atmos Master File

Audio Definition Model Broadcast Wave Format file containing Dolby Atmos audio and metadata in a single WAV container.

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AtmosIR File

A configuration file format that stores input, binaural and re-render settings for the Dolby Atmos Renderer application.

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Audio Objects

Individual sound elements with associated positional, size and binaural metadata that can be placed anywhere in three-dimensional space.

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Bass Management

System that redirects low frequencies from main speakers to subwoofers based on crossover settings.

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Bed Audio

A channel-based audio component in Dolby Atmos that can range from stereo up to 7.1.2 channels.

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Bed Width

Channel configuration of a bed from stereo up to 7.1.2.

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Binaural Rendering

A process that creates an immersive audio experience over headphones using head-related transfer functions (HRTFs), reverb, and other audio processing techniques.

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Custom Groups

User-defined collections of beds and objects for stem-based workflows and re-renders.

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DAMF (Dolby Atmos Master File)

Native format of the Dolby Atmos Renderer application consisting of separate audio, metadata and presentation information files.

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Decibels True Peak (dBTP)

An oversampled peak level measurement that interpolates between audio samples to predict signal peaks.

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Dialnorm

Metadata parameter written into Dolby Digital, Dolby Digital Plus, Dolby AC-4 and Dolby TrueHD audio bitstreams to maintain consistent playback volume between different content.

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Direct Render

A downmix mode that recreates the Dolby Atmos sound field using phantom imaging between surround and front speakers, applicable to 5.1 and stereo outputs.

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Dolby AC-4 IMS

A next-generation audio codec for delivering Dolby Atmos at extremely low bitrates with binaural metadata support optimized for mobile and streaming devices.

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Dolby Atmos

An object-based immersive audio technology that uses metadata to precisely adapt sound mixes for any playback device in any environment.

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Dolby Atmos Album Assembler

A Dolby Atmos music mastering application used in conjunction with the Dolby Atmos Renderer to arrange, edit, sequence, and master Dolby Atmos ADM BWF files for delivery to streaming platforms.

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Dolby Atmos Binaural Settings Plug-in

A plug-in that controls the input configuration and binaural render mode settings of the Dolby Atmos Renderer application remotely from within a DAW.

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Dolby Atmos Conversion Tool

A standalone application for converting, editing, joining, and batch-processing Dolby Atmos master files between formats.

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Dolby Atmos External Renderer

A standalone application that runs on a dedicated workstation for processing and rendering immersive audio content.

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Dolby Atmos for Headphones

Dolby headphone virtualization technology that renders object-based and channel-based Dolby Atmos audio from any source, with special features designed to enhance different content types.

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Dolby Atmos Internal Renderer

An integrated Dolby Atmos Renderer within a DAW that enables mixing, monitoring and export of Dolby Atmos content directly in the DAW.

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Dolby Atmos Music Curve

A frequency response target curve used in tuning Dolby Atmos mix rooms developed to ensure consistent translation of music content between different studio monitoring environments.

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Dolby Atmos Music Panner

A plug-in for macOS included with the Dolby Atmos Renderer that positions audio objects in Dolby Atmos mixes and includes a sequencer for syncing panning to session tempo; enables Dolby Atmos mixing in DAWs without Dolby Atmos integrations.

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Dolby Atmos Renderer

A dedicated hardware or software solution that renders beds and objects in real-time and creates Dolby Atmos master files.

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Dolby Atmos Renderer Remote

An application that provides remote control of a dedicated Dolby Atmos Renderer workstation over a network connection.

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Dolby Audio Bridge

A virtual audio interface providing 130 channels of DAW output routing to the Dolby Atmos Renderer application (macOS only).

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Dolby LTC (Linear Timecode) Generator

A plug-in that generates SMPTE timecode for synchronization between the DAW and Dolby Atmos Renderer.

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Dolby TrueHD

A lossless audio codec for Blu-ray delivery that supports both channel-based and immersive audio content.

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Downmix Modes

Methods for converting Dolby Atmos content to channel-based re-renders using coefficients and trim controls; see also: Trim Controls.

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Dynamic Metadata (Atmos)

Metadata such as object position and size that changes throughout a Dolby Atmos master file, including three-dimensional positional coordinates and size information stored as Object Audio Metadata (OAMD).

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FFOA (First Frame of Action)

Metadata parameter in a Dolby Atmos master file at which program content begins, indicating where pre-roll ends.

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Frame Rate

Number of frames per second used for synchronization with a DAW and video content.

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IMF IAB (Interoperable Master Format Immersive Audio Bitstream)

Dolby Atmos master file format used for delivery in post-production workflows.

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Input Configuration

Assignment and organization of renderer inputs between beds and objects.

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JOC (Joint Object Coding)

Encoding process that enables backwards compatible Dolby Atmos delivery in Dolby Digital Plus streams.

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LFE (Low Frequency Effects)

Low Frequency Effects channel dedicated to content below 120 Hz.

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LFOA (Last Frame of Action)

The timecode of the frame which contains the last frame of program (or action) of the content.

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Live Re-render

Real-time generation of channel-based outputs for monitoring or recording.

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LKFS / LUFS (Loudness, K-weighted, Relative to Full Scale / Loudness Units Relative to Full Scale)

A measurement standard (ITU-R BS.1770) that tracks perceived audio loudness using K-weighted frequency scaling relative to full scale.

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Lo/Ro (Left only/Right only)

A stereo downmix mode that sums surround channels equally to left and right outputs.

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Loudness Target

Integrated LKFS/LUFS measurement specification for delivery that ensures consistent playback across different content and devices.

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Lt/Rt (Left Total/Right Total)

A matrix-encoded stereo downmix that preserves surround information for Pro Logic decoding.

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M&E (Music and Effects)

A stem delivery containing all audio elements except dialog used for language localization and foreign dubbing workflows.

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Monitor Layout

Output format choice that determines how the renderer maps audio to available speakers.

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Monitoring Level

The sound pressure level (SPL) measured at the mix position when pink noise is generated through a single loudspeaker in the renderer software, also known as reference level.

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OAR (Object Audio Renderer)

A Renderer that processes bed and object audio to create renders based on the playback system configuration.

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Object Size

Dynamic metadata parameter controlling how widely an object's energy spreads in the sound field.

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Program Metadata

Static metadata that applies to an entire Dolby Atmos master file.

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Re-renders / Offline Re-render

Channel-based renders derived from a Dolby Atmos mix for specific speaker layouts, where offline re-renders are generated faster than real-time from a master file and live re-renders generate outputs in real-time for monitoring or recording.

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Spatial Coding

Process that groups nearby audio objects to reduce data while preserving spatial intent during delivery.

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Trim Controls (Atmos)

Parameters that adjust the relative levels of surround and height content during downmixing.

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True Peak

Interpolated peak loudness measurement accounting for intersample peaks, as defined in ITU-R BS.1770 and EBU R128.