http://floooh.github.io/2016/04/09/oryol-3rd-party-code.html
All the C libraries in there should be trivial to integrate with Rust, the C++ libs might be a bit more complicated though.
For audio, I can recommend SoLoud, it's multiplatform and also works well in asm.js/wasm (and doesn't add much size):
http://sol.gfxile.net/soloud/
http://floooh.github.io/2016/04/09/oryol-3rd-party-code.html
All the C libraries in there should be trivial to integrate with Rust, the C++ libs might be a bit more complicated though.
For audio, I can recommend SoLoud, it's multiplatform and also works well in asm.js/wasm (and doesn't add much size):
http://sol.gfxile.net/soloud/