legal concept defining a type of copyrightable work

Video featuring a performance of a song

track on an audio release

An original musical piece, or the process of creating a new piece

Wikidata metaclass; legal concept of uniquely identifiable piece or work of music, either vocal or instrumental; NOT applicable to recordings, broadcasts, or individual publications of music in printed or digital form or on physical media

group of similar audio releases typically of different formats (digital, CD, etc.)