This is a pita. You’ve installed and set up Mixxx, but your .m4a files are not shown in the library. You need to compile Mixxx from source, but it is fast to do so. Here’s how. I tested this on Ubuntu 16.04.02 LTS 64bit and it will build Mixxx 2.0 / 2.1 under “/mixxx”. YmmvContinue reading “Building and installing the MP4 / M4A / AAC plugin for Mixxx 2.0 / 2.1 on Ubuntu”