In Starbound you can create your own songs by using Musical Instruments
Use the keyboard to generate different notes
You can also import songs into the game. Files must be in .abc format and you need to put them in \Steam\steamapps\common\Starbound\assets\user\songs
In multiplayer you can create a Band of different players playing different instruments
External resources[edit]
http://abcnotation.com/mmorpg (songs in .abc format and much more)
http://www.lotro-abc.com/ (songs in .abc format)
http://reissendewoelfe.de/abc/ (songs in .abc format)
http://www.thefatlute.eu/ (songs in .abc format)
http://www.nilsliberg.se/ksp/easyabc/ (tool for creating music in .abc)