MojoAL
MojoAL is a full OpenAL 1.1 implementation, written in C, in a single source file. It uses Simple Directmedia Layer (SDL) 2.0 to handle much of the heavy lifting and platform abstractions, allowing you to have a simple, portable OpenAL on any platform that SDL supports, from desktops to phones to web browsers to the Nintendo Switch.
This project can be compiled directly into an app, or built as a shared library, making it a drop-in replacement for other OpenAL implementations.
All of core OpenAL 1.1 is supported, including audio capture (recording) and multiple device support. A handful of popular extensions are also included.