Comment 10 for bug 726991

This is part of my project for Mixxx during Google's Summer of Code. I have an almost complete encoder implementation here (source and discussion) using libfdk-aac: https://github.com/Palakis/mixxx/pull/4
This works for Recording, but Live Broadcasting requires modifications to libshout, as mentioned above.
libfdk-aac is not required at compile and run time. It is dynamically loaded from a version copied to Mixxx's installation (Windows) or available system-wide (Linux, macOS). Mixxx on Windows can even use libfdk-aac provided with Daniel Nöethen's B.U.T.T encoder by automatically detecting its location.