Using the audio importer for its basic usage is really easy: once the plugin is activated, just drag and drop your MP3, AAC or WMA file in the editor like you would do with a WAVE file, and it will just work.
Now, if you want to use the other functionalities of the plugin, this is the page you're looking for.
Importing audio files (MP3, WMA or AAC) at runtime is easy. All we need is calling "Convert Audio File" which takes as parameter the path to the audio file, and returns a USoundWave reference that can be used to play the audio.
Audio Importer settings are reachable from the project settings, under the tab "Audio Importer" in the "Plugins" section.
It actually provides only one parameter:
Convert Mono Audio Files to Stereo: check this option, to automatically add a second channel to all mono audio files, the second channel will be identical to the first one.
Adding new formats