Game Neural Spatial Sound Guide

Bring the position of in-game sound
back to your headphones

Footsteps closing in from behind, a car overtaking beside you, a chopper passing overhead.

The game has already placed every sound exactly where it belongs. But by the time it reaches your headphones, it is folded down to left and right — and front, back, and height vanish.

A few settings bring those positions back. First, check whether your in-game audio settings offer a Home Theater / 5.1 Surround / 7.1 Surround option.

Solution · NeiSa

NeiSa restores every sound
to its original position

NeiSa receives multichannel sound discretely and renders it in real time into a virtual 7.1 built on a model of human hearing, generating 360° spatial audio over headphones. It also expands stereo sources into a wide, vivid surround image. It works on the headphones and earbuds you already use.

Artwork of an embedded NeiSa chip reconstructing an entire battlefield of sound into surround
Multichannel → Virtual 7.1Stereo → Expanded surround image360° Sphere
In three lines
  1. Games fix a position for every sound, and many output those positions as 7.1 channels.
  2. Headphones have only two channels. Eight channels fold into stereo, and front-back disappears.
  3. Before the mix folds to stereo, spatial audio pre-renders how sound reaches both of your ears to recreate the surround image.
That said, some games output a headphone-ready 2-channel signal from the start. The channel count is the same, but directional information is already baked in, so the setup is the exact opposite. The support document explains how to tell them apart.
What you need
  • A device with NeiSa neural spatial audio built in — it comes as a DAC, sound card, HDMI audio converter, USB dongle, or standalone dongle. A dedicated processing chip handles it, so latency stays low with plenty of headroom
  • The headphones or earphones you already use — USB supported today; 3.5mm and wireless support is expanding
  • A game that outputs multichannel — if its audio settings include Home Theater / Surround / 5.1 / 7.1, it qualifies
Set it up like this
  1. Change your game audio output to 7.1 — not “Headphones”
  2. Turn everything else off — Windows spatial audio, in-game 3D Audio · Binaural · HRTF, and sound effects
  3. Turn on the 7.1 spatial audio on your NeiSa device
  4. For games that only output stereo, turn 7.1 off and enable EX-STEREO mode or FPS mode — it lifts the sound out of your head and widens the soundstage to about 90° on each side
New terms are collected in the glossary at the bottom.
Contents
01In headphones, everything folds into stereo.02Chip-based spatial audio recreates surround positions true to the original.03Enable spatial audio only on your NeiSa chip or device.
01The loss

In headphones,
everything folds into stereo.

As eight channels become two, front and back disappear.

In the game every source has position coordinates placed at front · side · rear output as 7.1 channels headphone output delivered to headphones folded into stereo inside your head, between the ears directional info is lost Information lost Front-backUp-down height Distance What remains — left-right
Left is the position inside the game; right is what reaches your headphones.
This is why you can't place a sound coming from behind. It happens as the channels are merged.
More detailwhy it folds to two channels

What is lost the instant they merge

A headphone has only two places sound can come from: left and right. That means the many channels a game sends have to be reduced to two.

There is only one way to reduce them: merge them. The rear channels blend into the front, and the height channels blend in too.

And that is where the problem starts. Once they are blended, there is no way to tell which sound was behind you.

Left and right survive: if it is louder on the left, it is on the left. But front and back have no such cue, because a sound from the front and one from the rear reach both ears almost identically.

That mid-match moment of “I can clearly hear it but I can't tell where it is” comes from exactly this. It is also why you nail left-right yet have to swing your view to confirm front-back.

Not all 2-channel is the same The 2-channel here means a stereo mix made by merging several channels. Directional information disappears in that process.

By contrast, some 2-channel is made for headphones from the start. The channel count is the same, but the directional information is already inside the sound. These two are set up in opposite ways; the support document (per-game output channels and how they were measured) explains how to tell them apart.
02Recreation

Chip-based spatial audio
recreates surround positions true to the original.

It embeds the directionality of surround speakers into the stereo signal.

If you set up speakers you'd place a speaker at each position Seven speakers and one subwoofer placed around the room = Build virtual speakers inside headphones Works on the headphones you already use
It recreates the speakers you would physically install as virtual speakers.
We locate direction from the time, level, and timbre differences in the sound that reaches our two ears. Synthesize those three together and even a 2-channel stereo signal can generate front-back and up-down direction.
More detailhow the ear locates direction

The ear locates direction three ways

Say a sound comes from behind and to the right. It reaches the right ear a fraction earlier. That time difference is the first cue.

The same sound is a little louder in the right ear, because your head slightly shadows the sound heading for the left ear. That level difference is the second cue.

And as the sound passes the outer ear, certain frequency bands are shaved off. The shape of that shaving differs for sound from the front versus the rear. That timbre difference is the third cue.

Spatial-audio processing calculates and generates all three. It relies on data measured in advance for how sound changes as it passes the head and outer ear — this is called an HRTF.

Instead of placing speakers, it produces the sound you would hear if the speakers were there. This is the approach called virtual surround.

There is a limit here The shape of the outer ear differs from person to person. The HRTF in a product is an average across many people, so it fits some listeners well and others less so.

Telling dead-front from dead-behind is the hardest of all — and that is true of every company's product.

What it actually sounds like

“I can hear if the car behind me is on the right or the left, the audio panning, added recently is very nice, it adds to the immersion.” Racing-game player · Steam community
But it varies a lot by game Another user in the same thread felt the engine sound didn't seem to come from the front — because that game hadn't placed its sound positions in fine detail.

Spatial audio only recreates the positions the game already set. If the game didn't place that sound behind you, you won't hear it behind you. The more finely a game is sound-designed, the bigger the difference.
03The check

Enable spatial audio
only on your NeiSa chip or device.

If the sound is muddy or has an odd ring, check for double processing.

Neural spatial audio processed once — crisp and sharp
On-Chip 7.1 Spatial Audio — Single-PassProcessed once on the chip · direction and timbre stay crisp
The same image processed twice — doubled and blurred
Stacked 7.1 Spatial Audio — Double-ProcessedSame processing stacked twice · like an out-of-focus screen, direction and timbre blur together
A screen analogy for double processing. Just as running an already-sharp image through an upscaler a second time makes it worse, spatial audio processed twice in two places collapses both position and timbre.
✗ Wrong path — double processing Game 7.1 multichannel In-game HRTF "Headphones" selected → 1st pass NeiSa device 7.1 spatial audio · 2nd pass Sound turns muddy direction · distance degraded ○ Correct path — single processing Game 7.1 multichannel Home theater / Surround passed through, not merged NeiSa device 7.1 spatial audio processing Direction survives direction · distance kept
Enable the spatial-audio effect only on your NeiSa chip or device. When two different methods overlap, they don't improve each other — they interfere and degrade the sound.
To get the most from the 7.1 spatial audio on your NeiSa device, turn off Windows spatial audio, in-game 3D Audio · Binaural · HRTF, and all sound effects.
More detailwhat to turn on and off · stereo-game settings

Why people say it sounds muffled

People often say that once they turned spatial audio on, the sound smeared or moved away. This is what happens when the same processing is applied twice.

Spatial-audio features live in three places: in the game, in Windows, and in the device. Turn all three on and you run the same calculation three times.

The effects don't add up. They interfere with one another and only degrade the sound.

What to turn on and off

Turn on only the 7.1 spatial audio on your NeiSa device, and turn everything else off. A dedicated processing chip handles it, so latency stays low with plenty of headroom.

LocationSettingNotes
NeiSa deviceOnTurn on the device's 7.1 spatial audio. This is where the processing happens.
Windows spatial audioOffSet Sound settings → Spatial audio to Off. This applies to both Windows Sonic and Dolby Atmos for Headphones.
In-game spatial audioOffTurn off anything labeled 3D Audio, Binaural, or HRTF.
Sound effects · audio presetsOffTurn off the game's sound-effect presets and Windows audio enhancements. They pre-alter the signal and throw off the position calculation.
When the game handles 3D Audio (HRTF) itself When a game handles its own 3D Audio (Stereo by HRTF) in a closed way, like CS:GO · CS2, set your NeiSa device to EX-STEREO or FPS mode. The game has already finished its headphone processing, so adding 7.1 on top double-processes it. The support document covers this in its output-channel breakdown and competitive-FPS notes.

For stereo sources, turn on FPS mode

Games that output only stereo carry no directional information. In that case, instead of 7.1 spatial audio, turn on the device's FPS mode.

It lifts the sound out of your head without forcing directions that aren't there. Because it invents no new direction, it is safe to enable in any game. Depending on the device, it may be labeled “stereo expansion.”

What to look for in game settings

Menu names differ from game to game. If you see any of the labels below, that's the setting.

What to checkExample labelsSetting
Game audio outputAudio Output / Speaker Setup / Audio MixHome theater · 5.1 · 7.1
not “Headphones”
In-game spatial audio3D Audio / Spatial Audio / HRTF / BinauralOff
Sound effectsSound Effect / Audio Preset / Dynamic RangeOff · default
Why pick Home theater when you're on headphones If you select “Headphones” in the game, the game merges everything to stereo on its own — and once merged, the sound can't be recovered.

“Home theater” is not a device choice. It is an instruction: don't merge — send it through as-is.
QUICK
▶ 60-Second Visual Guide
The whole idea in eight swipes — the best setup and the two common mistakes, image-first.
Support document
Per-game output channels and how they were measured (intermediate·advanced)
How many channels your game outputs, how those figures were measured, why the settings differ for competitive FPS, and how long it takes to adapt.
NeiSa
What kind of solution is NeiSa?
An introduction to NeiSa neural spatial audio, which delivers home-theater sound over headphones and earphones.
Movies
Movie Neural Spatial Sound Guide
A guide to getting cinema-grade dialogue clarity and dynamic surround over headphones when you watch movies or TV.
Music
Music Neural Spatial Sound Guide
A guide to enjoying multichannel music platforms and Google immersive audio over headphones.
Glossarychannel · stereo · downmix · FPS mode · HRTF · binaural
TermMeaning
ChannelHow many parts the sound is split into. 7.1 is 8, 5.1 is 6, and 2.0 is 2.
MultichannelOutput in more than two channels. 5.1 and 7.1 qualify.
StereoTwo channels, left and right. The default format for headphones and earphones.
SubwooferThe channel that carries only low frequencies. It is the “.1” in 7.1.
DownmixMerging many channels into fewer. It happens when 7.1 is reduced to stereo.
Spatial audioProcessing that recreates front-back and up-down direction from a headphone's two channels alone. It exists separately in Windows, in a dedicated device, and in the game.
3D AudioSpatial-audio processing the game performs on its own. It sits inside the game's audio settings.
FPS modeA setting that lifts sound that used to form inside your head out into the open. It invents no new direction, so it suits stereo games. Depending on the device it may be labeled “externalization” or “stereo expansion.”
HRTFData measured for how sound changes as it passes the head and outer ear.
BinauralA 2-channel signal made exactly as it would arrive at the ears. Directional information is already in it.
Auto-DetectValorant's speaker-setting option. Leave it on this value so the signal is handed off to external spatial-audio processing.
Game audio output-channel reference — PC Gaming Surround Sound Round-up (2026-05) · Valorant — developer patch notes 8.0
2026-07 · Specs may change with game updates.