Last.fm
You can use Aurral without Last.fm. A Last.fm API key improves recommendations, tags, and discover playlists.
Server setup
Section titled “Server setup”Add your Last.fm API key in Settings > Connect > Last.fm.
Per-user listening history
Section titled “Per-user listening history”Each user sets a Last.fm username in Profile. Aurral uses the username to make personal recommendations.

Discovery settings
Section titled “Discovery settings”Admins set the refresh interval and discovery mode in Settings > Discover. The available modes are Safer, Balanced, and Deeper.
If Last.fm is unavailable, Aurral can use ListenBrainz or Koito listening history when users have them configured.