If this could somehow be combined with Music Magic Mixer (also called MMM, Music IP mixer, Predixes Music Mixer and probably other names) it would be great. MMM creates playlists based on the sonic signature of the songs. It's now an orphaned software. I think it is open source. I've never found anything to take it's place. Quite slick. Just needs to be maintained, renamed (to Playlist maker or something so it doesn't get mixed up with recording software) brought up to date and marketed. Sounds simple. Right?