This uses the iTunesLibrary framework or MusicKit to emit JSON representing the music library.
It can also emit SQL code for a database. itunes_json --itunes --sql-code | sqlite3 > /tmp/itunes.db Right now the schema is documented only in code. Then you can get information such as last playdates in order: SELECT s.name, a.name, p.date, p.delta FROM songs s, artists a, plays p WHERE s.artistid=a.id AND p.songid=s.id ORDER by p.date;
In Catalina, the iTunes Music Library.xml file no longer exists. My web generator program relied upon this. This code uses the library to create JSON for web generator to read.