Audio Glossary

Spatial & Atmos.

16 terms

ADM BWF (Audio Definition Model Broadcast Wave Format)
A file format that embeds Dolby Atmos spatial metadata — object positions, sizes, and movements — directly inside a s…
Ambience
The natural background sound of an environment — room tone, air conditioning hum, distant traffic. In mixing, ambienc…
Bed (Dolby Atmos)
In Dolby Atmos, a bed is a fixed multichannel audio element rendered to specific speaker positions (e.g., 7.1.2). Bed…
Binaural
A spatial audio technique that uses head-related transfer functions (HRTFs) to simulate three-dimensional sound over …
Dolby Atmos
An immersive audio format developed by Dolby Laboratories that uses object-based audio to place and move sounds in th…
Dolby Digital (AC-3)
A perceptual audio coding format supporting up to 5.1 surround sound (six discrete channels), developed by Dolby Labo…
Downmix
The process of reducing a multichannel audio mix to fewer channels — typically from surround or immersive formats to …
Height Channels
Speaker channels positioned above the listening area, used in immersive audio formats to create a full three-dimensio…
HRTF (Head-Related Transfer Function)
A mathematical model of how sound is modified by the shape of the human head, outer ear (pinna), and torso before rea…
Immersive Audio
A category of audio formats and mixing approaches that place sound in three-dimensional space around and above the li…
LFE (Low Frequency Effects)
A dedicated audio channel in surround and immersive audio formats designed specifically for low-frequency content bel…
Metadata (Audio)
Data embedded within an audio file that describes the content but is not the audio signal itself — including title, a…
Object-Based Audio
An approach to audio mixing in which individual sounds are treated as independent objects with metadata describing th…
Phantom Center
The psychoacoustic illusion of a sound source appearing at the center of a stereo image when identical signals are re…
Renderer (Dolby Atmos)
The software application — the Dolby Atmos Renderer — used to monitor, mix, and export Dolby Atmos content. It interp…
Surround Sound
A multi-channel audio format that places speakers around the listener to create a horizontal 360° sound field. Common…

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