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Project Acoustics

Unreal · Unity · Wwise

Project Acoustics is a wave-based acoustics simulation system that bakes acoustic propagation into pre-computed data files. It models occlusion, obstruction, portalling, and reverberation using physics-based wave simulation during an offline baking process, then provides runtime queries for interpolated acoustic parameters. The system uses the Triton engine for voxel-free interpolation and supports multiple ACE files simultaneously. It includes HRTF processing validated through FLEX listening tests published in the Journal of the Acoustic Engineering Society. Runtime performance remains efficient by querying pre-baked simulations rather than computing wave propagation in real-time. Integrations provide spatial reverb, custom impulse responses, and parameter exposure to engine-native systems. The tool handles large worlds through double-precision mesh parsing and supports both middleware and engine-native audio pipelines.

Omnitone

Standalone

Omnitone is a Web Audio API implementation of ambisonic decoding and binaural rendering. It supports first-order (4-channel) and higher-order ambisonic streams (2nd and 3rd order, up to 16 channels). The library uses native Web Audio nodes for performance-critical processing, ensuring efficient CPU usage. The implementation follows the Google spatial media specification and uses SADIE binaural filters for rendering. It accepts input from HTML media elements or multichannel AudioBufferSourceNodes, with support for dynamic rotation matrices to orient the sound field in response to user interaction or sensor data. Omnitone powers the Resonance Audio SDK for web and provides both ambisonic and bypass rendering modes. The library is designed for browser-based spatial audio applications, VR experiences, and 360-degree video playback. Note: the last release (v1.3.0) was in January 2019, so the project is effectively dormant.

OpenPL

Standalone

OpenPL (Open Propagation Library) is a dissertation project exploring acoustic propagation modeling concepts similar to Microsoft's Project Triton/Acoustics system. Built with JUCE, it provides a framework for studying and implementing spatial audio propagation algorithms. The library is structured as modular components that can be opened in JUCE's Projucer for experimentation. As an academic research project, it focuses on understanding propagation-based acoustic simulation rather than production-ready integration.

Resonance Audio for Wwise

Wwise

Resonance Audio for Wwise is a plugin package that integrates Google's spatial audio engine into the Wwise authoring and runtime pipeline. It provides two plugins: a Renderer that spatializes sound sources binaurally via Wwise's Ambisonic bus pipeline (supporting up to third-order Ambisonics), and a Room Effects plugin that simulates early reflections and late reverberation based on parametric room geometry. The integration targets desktop (Windows, macOS, Linux) and mobile (Android, iOS) platforms. You set up an Ambisonic audio bus in Wwise Authoring, attach the Resonance Audio Renderer as a mixer plugin, and route sound sources through it. Room effects are applied per-source, letting you vary acoustic character across game spaces without baking impulse responses. Requires Wwise 2017.1.0.6302 or newer. This is useful when you need consistent, cross-platform binaural output from Wwise without relying on platform-native spatial audio APIs.