Spatial audio can be stored, exchanged and reproduced in several ways. The terminology becomes much easier once three different questions are kept apart:
A channel-based mix, an Ambisonics scene, object metadata and a binaural file answer different parts of that chain. None is automatically more immersive than another. The useful choice is the one that preserves the spatial idea from the studio to the actual listening situation.
A format describes how audio and spatial information are stored, exchanged or delivered. It may contain fixed channels, sound objects with metadata, a representation of a soundfield or a binaural headphone signal.
A method describes how sound is organised, rendered or reproduced in space. Some methods assume known loudspeakers; others keep positions flexible until rendering; some are designed for headphones; others depend on large loudspeaker arrays.
One project can use several formats and methods. For example, an installation may combine fixed multichannel ambience, object-based movement and a binaural preview during production.
The following chain helps place the terms:
Composition → spatial representation → rendering → delivery → playback
Composition defines what the sound should do. Spatial representation carries information about channels, objects or a soundfield. Rendering adapts that information to the target setup. Delivery packages the result. Playback makes it audible through loudspeakers or headphones.
Not every workflow needs a separate format at every stage. A permanent installation can be composed directly for its loudspeakers. A touring work may need a representation that can be rendered for different rooms. A web experience may be delivered as one binaural file.
Channel-based audio sends each signal to a defined output. Stereo, 5.1 and 7.1 are familiar examples, but exhibitions often use custom layouts with a different feed for each loudspeaker or zone.
This approach is direct and predictable. When the room and loudspeaker positions are known, the composition can be tuned precisely for that setup. Timing, level, movement and spill are controlled in relation to the place that will actually be heard.
The trade-off is flexibility. If the layout changes, the mix may need to be adapted or rebuilt. For permanent installations, however, that is not necessarily a problem. A carefully tuned fixed mix can be simpler to maintain and more reliable than a flexible live system.
Ambisonics and scene-based audio
Ambisonics represents a soundfield rather than assigning every sound directly to a loudspeaker. Directional information can later be decoded for a loudspeaker setup or rendered binaurally for headphones.
This makes Ambisonics useful for 360-degree video, VR, spatial recording and projects that may move between playback environments. Higher orders can carry more spatial detail, provided that the recording, production and playback chain support it.
Ambisonics does not remove the need for careful playback design. The final impression still depends on decoding, loudspeaker layout, room acoustics and listening position.
Object-based audio
Object-based audio keeps individual sounds separate and adds metadata such as position, level, movement or behaviour. A renderer then adapts those objects to the playback setup.
This is useful when sources need to move, respond to interaction or remain editable until late in production. It can also help a project adapt to different loudspeaker layouts.
The flexibility comes with responsibility. Objects need clear naming, behaviour, routing and fallback rules. A sophisticated object workflow is only helpful when the playback system and the operating team can support it.
Binaural audio
Binaural audio creates a spatial impression over two headphone channels. It uses cues that our hearing normally interprets as direction and distance around the head.
It is central to headphone experiences, VR, audio walks and online delivery. It is also useful for reviewing spatial ideas before the final loudspeaker system exists.
A binaural preview is still a preview of a shared room, not a copy of it. Head tracking, headphone response and individual anatomy affect the result, while reflections, bodies and loudspeaker coverage in the final architecture remain absent.
Wave field synthesis
Wave Field Synthesis uses many loudspeakers to approximate the wavefronts of virtual sources. In suitable conditions, a source can appear to remain in a stable position as listeners move through a larger area.
The method can be powerful for specialised environments, but it asks a great deal of the room, array geometry, processing and calibration. It becomes relevant when that effort clearly serves the spatial concept—not simply because the technology is impressive.
Most installations are hybrids. A stable ambience may be rendered to fixed channels, while a few sources move as objects. Field recordings may arrive as Ambisonics, and the team may review the work binaurally before it is tuned on loudspeakers.
This is not a compromise. It is often the clearest way to give each part of the experience the right degree of flexibility. The goal is not technical purity; it is a coherent result that survives production, installation and daily operation.
Start with what must remain flexible and what can be fixed.
Choose a channel-based approach when the room and layout are known and direct, reliable control matters most. Consider Ambisonics when soundfield material must travel between playback contexts. Use object-based workflows when individual sources need adaptable position or behaviour. Make binaural delivery central when the audience listens on headphones. Explore Wave Field Synthesis when stable virtual sources across a larger area are essential and the architecture can support the array.
Then test the choice against practical conditions: production time, renderer, playback hardware, show control, documentation, content updates and maintenance. A flexible format may ask more of integration. A simple render may be easier to run but harder to adapt later.
Visitor environments rarely offer one ideal listening point. People move, gather and enter at different moments. The chosen method must therefore support the role of sound in the room: local to an object, clear around a screen, moving along a route or connecting several spaces.
Long-term operation is part of the decision. The delivery must be documented, serviceable and understandable to the people who keep the installation running. A format that works beautifully in the studio but cannot be monitored on site is not a complete solution.
We begin with the listening intention, then choose the least complicated chain that can carry it. We prototype the critical spatial behaviours, test them against the expected playback system and document the route from source material to final outputs.
Format, renderer and system are developed together. The final decision is made by listening—not by the label attached to the technology.
A broader introduction to how sound is positioned, distributed and perceived in relation to space and listener movement.
Spatial Audio Systems & Renderers
How spatial decisions are translated into signals for the loudspeakers, headphones and processors that make them audible.
Spatial Audio Production Workflows
How formats, renderers, previews and on-site tuning are connected from the first sketch to the installed system.
How object-based and real-time audio can respond to movement, presence, data or changing media.
Is Ambisonics the same as spatial audio?
No. Ambisonics is one way to represent a soundfield. Spatial audio is the broader practice of designing sound in relation to space and listening position.
What is object-based audio?
It keeps sounds as separate objects with metadata such as position or movement. A renderer translates them for the target setup.
Is binaural audio only for VR?
No. It is also used for audio walks, online experiences, headphone installations and spatial previews.
Which format is best?
There is no universal best format. The right choice depends on the spatial intention, playback condition, production workflow and long-term operation.
Can different methods be combined?
Yes. Hybrid workflows are common and often desirable when different parts of an experience have different needs.
We help choose and test the format, method and delivery chain that can carry a spatial idea from production into the real conditions of the site.
