Dolby Atmos
Definition
Object-based immersive audio format by Dolby that combines a channel-based bed (typically 7.1.4 — seven ear-level speakers, one subwoofer, four height speakers) with up to 118 individually positioned audio objects rendered in three-dimensional space.
Context
Dolby Atmos has become increasingly relevant in music production as streaming platforms (Apple Music, Tidal, Amazon Music) support spatial audio playback. The Dolby Atmos Renderer processes beds and objects into the appropriate output for the listener’s system — a full speaker array, soundbar, or headphones via binaural rendering. Pro Tools is the primary professional DAW for Atmos mixing, while Logic Pro offers the most accessible entry point with built-in spatial audio tools. Delivery uses the ADM BWF format assembled via the Dolby Album Assembler, targeting -18 LUFS-I and -1 dBTP.
A critical practical reality: Apple’s Spatial Audio ignores Dolby’s binaural metadata (near/mid/far object distance settings) and applies its own undocumented spatialization, meaning Atmos mixes can sound significantly different between the two renderers. Bed tracks translate more consistently across renderers than objects (up to 4.5 dB level difference with objects). The LFE channel should be avoided or used sparingly in music — calibration varies wildly across playback systems.