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SPECIFICTION
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Steam Audio SDK

valvesoftware.github.io

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Visit valvesoftware.github.io
Spec score 7.6 #18 of 24 in Game Audio Middleware

What it is

Steam Audio SDK is a free toolkit for adding spatial audio to games and VR/AR apps. It renders positional audio binaurally using HRTFs to model sound direction relative to the listener. Environmental features include physics-based sound propagation, occlusion, reflections and reverb. The SDK can spatialize Ambisonics audio and rotate it with listener orientation, and developers can provide HRTFs in AES SOFA format. Multicore CPUs and supported GPUs can accelerate environmental simulation and rendering. Listed integrations include Unity, Unreal Engine, FMOD Studio, Wwise and a C API. The C API is intended for custom game engines, audio middleware and digital audio workstations, and can be called from languages that use external libraries. Supported systems include Windows, Linux, macOS, Android and iOS; SteamOS is also listed as a runtime platform. Integration requirements include Unity 2017.3 or later, Unreal Engine 4.27 or later, FMOD Studio 2.00 or later and Wwise 2023.1.0 or later. The project describes its development tools as being in Beta. Steam Audio is available free to developers, subject to a license agreement.

Spec sheet

Purpose
Steam Audio is a cross-platform toolkit for adding spatial audio to games and VR/AR apps.Read 3 Oct 2026 · valvesoftware.github.io
Intended users
The C API is intended for custom game engines, custom audio middleware, and digital audio workstations, and can be called from languages that use external libraries.Read 3 Oct 2026 · valvesoftware.github.io
Integrations
The official site lists Unity, Unreal Engine, a C API, FMOD Studio, and Wwise integrations.Read 3 Oct 2026 · valvesoftware.github.io
Ambisonics
It can spatialize Ambisonics audio and rotate it according to listener orientation.Read 3 Oct 2026 · valvesoftware.github.io
Custom HRTFs
Users can supply HRTFs in AES SOFA format.Read 3 Oct 2026 · valvesoftware.github.io
Environmental effects
Its features include physics-based sound propagation, occlusion, reflections, and reverb.Read 3 Oct 2026 · valvesoftware.github.io
FMOD requirement
The FMOD Studio integration requires FMOD Studio 2.00 or later.Read 3 Oct 2026 · valvesoftware.github.io
Performance
Steam Audio can use multicore CPUs and supported GPUs to accelerate environmental simulation and rendering.Read 3 Oct 2026 · valvesoftware.github.io
Spatial audio
It renders positional audio binaurally using HRTFs to model sound direction relative to the listener.Read 3 Oct 2026 · valvesoftware.github.io
Support status
The official homepage invites feedback on Steam Audio and its development tools, which it describes as being in Beta.Read 3 Oct 2026 · valvesoftware.github.io
Supported systems
The C API documentation lists Windows, Linux, macOS, Android, and iOS support, with platform and version requirements.Read 3 Oct 2026 · valvesoftware.github.io
Unity requirement
The Unity integration requires Unity 2017.3 or later.Read 3 Oct 2026 · valvesoftware.github.io
Unreal requirement
The Unreal Engine integration requires Unreal Engine 4.27 or later.Read 3 Oct 2026 · valvesoftware.github.io
Wwise requirement
The Wwise integration requires Wwise 2023.1.0 or later.Read 3 Oct 2026 · valvesoftware.github.io

Plans and prices

Steam Audio SDK Free Available for free to all developers Free to all developers · License agreement applies Read 3 Oct 2026 · valvesoftware.github.io

Every Steam Audio SDK plan and price →

Strong points and limits

Strong points

  • Free to developers, subject to a license agreement
  • Supports positional audio and environmental effects
  • Accepts custom HRTFs in AES SOFA format
  • Integrations include Unity, Unreal Engine, FMOD and Wwise

Limits

  • Development tools are described as being in Beta
  • Integrations have minimum version requirements

Who it suits

Steam Audio suits developers adding spatial sound to games or VR/AR apps, including teams using custom engines, middleware or digital audio workstations. Its integrations have minimum version requirements.

Verdict

Steam Audio offers positional rendering and environmental simulation across several engines and platforms. Developers should check the integration version requirements and account for the stated Beta status.

Where Specifiction places it

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