When viewing the tracks in an album (displayed as a list), or when viewing tracks in a playlist, please consider displaying the 0-5 star rating for each song. This helps with knowing which songs have been listened to in the past, and if one wants to revisit certain songs, there's a "history" to reference.
When building a playlist with jazz music for example, it's very helpful to see how I felt about a track in the past because I may want to revise my rating based on a more recent listen. If screen space is limited, you could show a star with a number before or after it. So, three stars could be 3*. Zero could be a star outline with a zero.