Either you give more recommendations based on the vector of an entire playlist, returning more songs to enter, or you get other people's playlists by inputting a song. Or both, or a mix of them. Either way, playlist recs/album recs would be a pretty natural next step.
Playlist Sharing
Tied to the one above. Sharing playlists or songs between users would be a great idea.
User-Vector Interaction
As a user, I would want to be able to look up songs by vector element. Maybe a I want a song with low danceability, who knows?
Playlist Recommendations
Either you give more recommendations based on the vector of an entire playlist, returning more songs to enter, or you get other people's playlists by inputting a song. Or both, or a mix of them. Either way, playlist recs/album recs would be a pretty natural next step.
Playlist Sharing
Tied to the one above. Sharing playlists or songs between users would be a great idea.
User-Vector Interaction
As a user, I would want to be able to look up songs by vector element. Maybe a I want a song with low danceability, who knows?