I've added a "non-free package option" so if you want to have Citra & proper music you have to pull in the code, alter one single var from no to yes & compile it. Basically copy & paste. This will build ffmpeg with fdk-aac support and so Citra should work with those specific aac files too.
non-free package option:
AAC-LC patents should expire this year so this will not be a problem anymore