The upload/download bit will work with any music formats.
The playlist management is coded with implicit assumuption that file names have the following format:
- song_name - artist_name [single_letter_playlist_tags].mp3
- e.g. new soul - yael naim [ac].mp3
i.e. do not use '[' and ']' anywhere else in the file name!
Current version of code assumes that authentication tokens are already saved to disk. See the docs.