[pjmlp]

Nope, they are also available as they are Khronos standards for audio, and Mesa also does OpenGL ES.

Do you need a tutorial?

[jhasse]

You mean OpenSL ES? Is anyone actually using that on desktop? On Android there's https://github.com/google/oboe.

While Mesa has OpenGL ES it wasn't always available (for example not all drivers are using Mesa).