How to represent the relationship between artists and albums in an entity-relationship diagram I'm learning and practicing with the E-R model trying to design a music industry database.

With this section of the diagram I have a doubt:


I suppose an album can be had by an artist and a band, not necessary by only one of these. How can I represent this relationship?
Replace ALBUM with SONG, keep ALBUM but add a "many to many" relationship between the two.

There are still a lot of complexities you are missing (eg "Artist formerly known as Prince" vs "Prince", cover songs, etc)