RoomAcoustiC++: An open-source room acoustic model for real-time audio simulations

Mannall J, Savioja L, Neidhardt A, Mason R, Sena ED. RoomAcoustiC++: An open-source room acoustic model for real-time audio simulations. In: 2025 AES International Conference on Headphone Technology. Audio Engineering Society; 2025. Paper 6. Available from: https://aes.org/publications/elibrary-page/?id=22932

@inproceedings{Mannall2025_22932,
  author = {Mannall, Joshua and Savioja, Lauri and Neidhardt, Annika and Mason, Russell and Sena, Enzo De},
  title = {{RoomAcoustiC++: An open-source room acoustic model for real-time audio simulations}},
  booktitle = {2025 AES International Conference on Headphone Technology},
  note = {Paper 6},
  year = {2025},
  month = aug,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22932}
}

TY  - CPAPER
TI  - RoomAcoustiC++: An open-source room acoustic model for real-time audio simulations
AU  - Mannall, Joshua
AU  - Savioja, Lauri
AU  - Neidhardt, Annika
AU  - Mason, Russell
AU  - Sena, Enzo De
T2  - 2025 AES International Conference on Headphone Technology
M1  - Paper 6
PY  - 2025
DA  - 2025/08/18
UR  - https://aes.org/publications/elibrary-page/?id=22932
PB  - Audio Engineering Society
LA  - en
AB  - An open-source C++ library named RoomAcoustiC++: Real-time Acoustics Library for real-time room acoustic modelling is introduced that implements a hybrid geometric acoustic and feedback delay network model. The geometric acoustic component uses the image edge model to locate geometry-dependent early specular reflections and edge diffraction. The feedback delay network models late reverberation for a target reverberation time. The model is capable of a dynamic simulation including moving geometry, sources and listener and changing wall absorption, with binaural spatialisation over headphones and customisable head-related transfer functions using the 3D Tune-In toolbox. A comparison with existing closed-source and open source projects is presented. This found that many state-of-the-art room acoustic models for real-time applications are closed-source, limiting reproducibility. RoomAcoustiC++ offers an improved room acoustic model compared to existing open-source projects. The library was validated against physical measurements from the Benchmark for Room Acoustic Simulations (BRAS) database. An analysis of the real-time performance shows that the software is capable of binaural rendering for scenes with occluding geometries and multiple sources.
ER  -