Comment 3 for bug 1831227

OK, so we should add these columns:

timbre,color,energy,style,mood

What is the difference between timbre and color?
Is style a tag like field? Can we implement that as crate?

Spotify has:
https://developer.spotify.com/documentation/web-api/reference/tracks/get-audio-features/
Energy, Danceability, Valence, Acousticness, Instrumentalness, Liveness, Speechiness
Is that also useful?