OpenAL Soft
A software implementation of the OpenAL 3D audio API with attenuation, Doppler, directional sources, streaming, capture, and EFX features such as reverb, occlusion, and air absorption.
Why use it
Custom engines can expose spatial audio through a stable C API and reuse HRTF plus native device backends instead of rebuilding the complete mixer-device layer per platform.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
LGPL-2.0-or-later distribution needs a compliant dynamic-linking or relinking path and notices; teams must also verify backend selection, latency, and HRTF cost on every target device.