Unlocking Immersive Sound: A Guide to 3D Audio
Have you ever wanted to transport yourself into the heart of a concert hall or immerse yourself in the sounds of nature without leaving the comfort of home? With the emergence of spatial audio, this easily becomes a reality. If you’re looking to buy some new headphones, a shiny TV set, a set of loudspeakers, a smartphone or another audio gadget, you’re probably having to get your head around a long list of fancy-sounding marketing buzzwords, and one of the most popular out there right now is spatial audio. In this beginner's guide, we’re exploring the world of spatial audio, how it works, and how you can listen yourself.
What is Spatial Audio?
Spatial audio is a much sought-after feature offered within a wide range of products, from audio options such as some of the best Dolby Atmos soundbars and best earbuds and best VR headsets, to source devices such as a smartphone, tablet or TV. Spatial audio is an innovative technology that creates a three-dimensional listening experience, making it seem as if sound is coming from various directions and distances. Unlike traditional stereo sound, where audio is delivered through two channels (left and right), spatial audio adds an extra dimension by incorporating height. This technology allows you to perceive sound as though it's coming from specific locations around you, mimicking how sound travels in real life. The point of spatial audio is to create a surround-sound effect to make music, movies and games sound more immersive, as though they’re occurring all around you - including overhead - rather than in one place. No longer will the audio in your TV sound like it’s coming from one distant point in your living room: it’ll be taking place all around you. Yes, those bullets can fly past your shoulder.
How Does Spatial Audio Work?
At a glance, spatial audio - sometimes called 3D audio effects, or in its various guises including (but not limited to) DTS:X, Dolby Atmos, 360 Reality Audio, THX Spatial Audio and Dirac Virtuo - is processing tech which manipulates the sound coming from the drivers in your tower speaker(s), headphones, soundbar, tablet, laptop or smartphone, to make music and movies sound like they're taking place in the space around you. Unlike stereo or surround sound, spatial audio uses sophisticated algorithms, advanced processing techniques, and specialized hardware to recreate lifelike soundscapes. Using object-based sound technology, such as Dolby Atmos, sound objects (including vocals, instruments, or effects) are strategically assigned to specific locations in a 3D space rather than a fixed channel.
Spatial audio works to artificially make it feel as though sound is surrounding you, rather than just coming from the one direction in which said speaker resides. Say you’re listening to spatial audio on a single speaker, like Sonos Era 300. To produce sound that feels like it’s coming from above, upward-firing drivers in the speaker bounce sound off the walls and ceiling, which get reflected to a specific location in the room. Because audio isn’t being projected in one direction, as is the case with mono and stereo sound, your content feels like it’s hitting you from every direction.
And thanks to the nature of closed-back headphones, spatial audio can be further manipulated here. Here, "head-tracked spatial audio" can actually make it feel as though you're surrounded by music and moving through it, as you might if you were able to simply walk through an orchestra, turning your head to the strings, brass and percussion. This uses your source device as a focal point (ie. your tablet might be the orchestra), but still applies the directional filters to create a three-dimensional soundscape. Yes it's cool, when done well.
A standout quality of Dolby Atmos is its ability to adapt to various hardware and playback setups. Whether listening on headphones, a smart speaker, or a complete home theater system, Dolby Atmos optimizes the sound to your environment for a more realistic listening experience.
Why Should I Listen with Spatial Audio?
Spatial audio brings you closer to the creator's original intent, allowing you to hear your content the way it was meant to be heard. When listening to music, you'll feel as if you're in the recording studio, surrounded by every instrument and nuanced detail. If you’re listening to rock, the rhythm guitar might be noticeably to one side while the lead guitar is on the other. In jazz, you’ll be able to hear the different instruments spread out as though you’re in a smoky bar listening to a quartet live. Turn on some classical and it’ll be like you’re in a concert hall: violins to one side, cellos to the other, brass as far away as possible.
This all helps you appreciate the intricacies and nuances of a song, and also makes music feel all-encompassing and immersive rather than something being dripped into your ear by some inexpensive earbuds. When watching a movie, the explosions will reverberate around you, the dialogue will appear to come from specific corners of the room, and ambient sounds will transport you into the center of the scene - it's like having a private cinema right in your living room. One of the reasons why a movie theater is so immersive is that the audio speakers are all around you, and it means that sounds are too: a lightsaber wooshing on the left of the screen will sound like it’s coming from your left, while a romantic line echoed in the character’s right ear will come from the right of the screen, and an all-encompassing battle scene will sound like it’s all around you.
Spatial audio is essentially a way for your headphones, TV or other sound-giving device to give you a similar performance but on a smaller scale. Sound will be panned to different areas around you, so you feel immersed in the audio-visual experience as the story plays out around you. Spatial audio enriches your emotional connection to your content by making it more engaging and lifelike.
And when gaming, Spatial Audio options like Razer THX or JBL Quantum are arguably even more important than ever. They'll let you fully submerge yourself into a world you're exploring, alert you to the sparkle of a collectible nearby, or hear an enemy tip-toeing around behind you so you can accurately pin-point where they are.
How Can I Listen to Spatial Audio at Home?
To experience your music and movies in spatial audio from the comfort of home, you’ll need two things: a Dolby-Atmos supported streaming service and a compatible device. Essentially, to enjoy spatial audio you’ll need a device that supports it, and will (usually) also need to find a video or song that's been encoded in a format that supports spatial or 3D audio. There are a few different names for spatial audio offered by companies, so when you’re buying a new set of cans, earbuds, soundbar or the like, check out its feature list to see if it’s compatible. Given that spatial audio, under its various monikers, is a big selling point, you’ll likely see it talked about in promotional materials for any new product.
Below are a few types of devices you can use to play Dolby Atmos content:
- Headphones: One of the most popular ways to experience spatial audio is with a pair of headphones. Over-ear headphones like Sonos Ace have the ability to create an exceptional acoustic seal around your ears, making you feel completely surrounded by what’s playing.
- Smart speaker: If you want to experience spatial audio out loud instead of using headphones, some smart speakers - like Sonos Era 300 - can fill a large space with immersive Dolby Atmos content. No matter where you are in the room, it will feel like the music is playing all around you.
- Soundbar: Similar to a smart speaker, some high-end soundbars, like Sonos Arc Ultra, can support spatial audio for movies and TV shows for a theater-like experience. These systems often include upward-firing drivers to bounce sound off the ceiling to create an all-encompassing effect.
- Gaming console: If you want to put yourself inside your games, certain consoles and PCs with compatible sound cards can deliver a truly lifelike experience when playing content mixed in Dolby Atmos.
- Virtual reality (VR) headset: Some VR headsets provide spatial audio as part of their virtual experiences. When pairing spatial audio with VR content, these headsets can offer an incredibly immersive audio-visual experience.
Next up, content. So, movies: you’ll need to watch something that supports spatial audio, and this is where it can get a little bit tricky. It all depends on which service you get your entertainment from and which video or song you’re trying to play.
If you want to use spatial audio to enjoy music, there are select streaming services you can use freely - the big ones are Apple Music, Tidal and Amazon Music Unlimited. At the time of writing, Spotify and Google Play Music don’t offer spatial audio catalogues, but patents suggest that the former, at least, is looking into it.
For movies and TV shows, most streaming services offer some spatial audio content, but it's almost always locked behind premium subscription tiers. On Netflix and Disney Plus you need to be a Premium subscriber, Paramount Plus requires you to be on its Paramount Plus with Showtime plan and Max needs you to sign up to its Ultimate tier. Even then, not all content will have Spatial Audio, but a lot more does, especially blockbuster movies. Apple TV Plus supports Spatial Audio on its sole plan while Prime Video has it on certain videos, and again you won’t need to pay any extra for that. Most streamers have a tag for spatial audio movies and shows, but not all do. A fairly well-hidden Netflix tag lists all of its compatible offerings, though.
It’s well-worth pointing out, however, that a few products offer a faux-spatial audio that creates a similar effect for movies or songs that don’t officially support the feature in itself - see the Bose QuietComfort Earbuds Ultra for starters. It’s a nice workaround for those who don’t want to pay out the ears for a premium streaming service.
Spatial Audio: Do You Need It?
As with most things in the world of audio buzzwords, you don't need spatial audio; it's not like you literally won't be able to enjoy your music, game or movie without it. Instead, spatial audio is simply a way to enhance the listening experience; worth it if you can afford the tech and put a lot of value in immersive entertainment.
For watching movies and TV shows, spatial audio will put you several steps closer towards creating an all-encompassing home entertainment system. With more and more new movies hitting streaming services instead of theaters, it's a valuable investment.
In terms of music, audiophiles may enjoy the nuance that spatial audio brings to sounds, but it's worth pointing out that spatial audio isn't the same as high-fidelity music, and if you have to pick only one new sound tech to get involved with, hi-res audio might help you better enjoy the detail in your music.
It's in the gaming realm that spatial audio is perhaps most important; not only is immersion (arguably) a more important factor, but being able to hear sound from all directions can be vitally useful in competitive games.
Spatial Audio vs. 3D Audio: Are They the Same?
A common question that arises when discussing these concepts is, “Are 3D audio and spatial audio the same?” The answer is nuanced. While these terms are often used interchangeably, they aren’t exactly synonymous.
3D audio may often refer to any audio playback technology that is capable of giving the impression of three-dimensional space. This includes sounds coming from in front, behind, above, or below the listener. In this sense, 3D audio is more of a broad concept that encompasses spatial audio as one method of achieving immersive sound.
However, spatial audio more typically refers to a set of underlying technologies that enable 3D audio, like Dolby Atmos, THX Spatial Creator, or Sony 360 Reality Audio - to name a few.
What is Immersive Audio?
Immersive sound - or audio - is another important term to define. Immersive audio refers to a sound experience that surrounds the listener, creating a sense of depth and space. It gives the impression that sound is coming from all around, including above and below, making the audio more engaging and lifelike.
The audio technology used to create immersive audio experiences often uses multi-channel setups or object-based mixing, which allows sounds to be precisely positioned in a 3D space.
Applications in Music, Film, and Gaming
In the world of music production, spatial audio offers new creative possibilities for artists and producers. No longer confined to two speakers, they can craft songs where instruments and vocals exist in a 3D space. For example, a vocal track might seem to be positioned right in front of you, while synths float overhead, and reverbs and delays trail off behind you.
Platforms like Apple Music and Tidal are already supporting spatial audio, giving listeners an enriched experience with tracks specifically mixed for this format. Meanwhile, mixes created with THX Spatial Creator can be experienced on any platform and any pair of headphones. Whatever the method, artists are using spatial audio to create more immersive music, with greater emotional impact and depth, where every instrument has its own space in the mix.
Since the release of Brave in 2012, spatial and immersive audio have become essential in modern filmmaking, particularly with formats like Dolby Atmos. These technologies allow sound designers to place audio objects dynamically within a 3D space, which dramatically enhances the storytelling experience.
For filmmakers, spatial audio means more than just effects. It enables richer narrative experiences by carefully positioning sound to guide the viewer's attention. Imagine the roar of dragons overhead in a fantasy movie - that’s the power of spatial sound.
Gaming has arguably seen the most widespread adoption of 3D sound. In games, audio plays a critical role in immersion, helping players locate enemies, navigate environments, and feel the atmosphere of a game world. Whether you're playing a first-person shooter or exploring an open-world RPG, spatial audio heightens the realism of the experience by placing sounds in specific locations around you.
Spatial audio in gaming is more than just a technical upgrade - it’s a key component of gameplay. For instance, in games like Fortnite or Call of Duty, the ability to hear the direction of gunfire or approaching footsteps can be a matter of survival.
How Spatial Audio Enhances the Future of Sound Design
The future of sound design almost inevitably includes more immersive experiences. As more industries embrace spatial and immersive audio, we can expect widespread changes in how we experience media.
In music, spatial audio seems to be here to stay, with major platforms investing heavily in it and more artists mixing their tracks to take full advantage of this technology. In cinema, immersive audio will continue to push the boundaries of storytelling, creating worlds that audiences feel they are truly a part of. And in gaming, 3D audio will remain an integral feature of next-gen consoles and virtual reality systems, shaping how players experience their virtual worlds.
As spatial audio becomes more accessible, with tools like the THX Spatial Creator plugin, and Dolby Atmos support in an increasing number of audio workstations, audio professionals and hobbyists alike can produce high-quality 3D mixes without needing a cost-prohibitive setup.
How to Create Spatial Audio at Home
Now that we've explored the possibilities of spatial audio, you might be wondering how to create these immersive soundscapes in your own music or sound design projects. Fortunately, the process is simpler than ever.
One popular method is to use plugins, like THX Spatial Creator, within your digital audio workstation. You’ll also find an increasing number of DAWs that support Atmos natively, including Logic Pro, Pro Tools, Studio One, Nuendo, Cubase, and more. These tools allow you to position sounds in a virtual 3D space. They use HRTF technology to simulate how our ears determine directionality, adding realistic reflections and spatial cues.
To get started with creating spatial sound:
- Use headphones: While spatial audio can be experienced on speaker setups, headphones are the most affordable entry into 3D audio - and one which you’ll find a great many listeners also use.
- Position audio in 3D space: Plugins like THX Spatial Creator let you place individual sound elements in specific positions. For example, a background vocals could be placed to the sides, while lead vocals stay centered, and background effects swirl overhead.
- Experiment with motion: Many spatial audio tools allow you to add movement to sound.
Spatial audio, immersive audio, and 3D sound are reshaping how we experience music, movies, and games. In the right hands, these technologies bring sound to life, creating a richer, more engaging experience by adding space and dimension. Whether you're an musical artist, filmmaker, or game sound designer, understanding and leveraging the power of spatial audio can elevate your creative projects and captivate your audience in ways not previously possible.