A browser extension / additional service that allows you to tag/lookup the music on google music / spotify by any set of strings. And I mean your own saved collection, not for sharing/exploring/social purpose. This can be faked to some extent by multiple playlists, but it's a bit hard to use in real life.
This would be great help when trying to dj dancing party: now show me a list of "blues", "chicago", "slow", "with breaks" to choose the next song. Actually in this context, separate service / app would be great - it would work on a mobile device, rather than just desktop.
About to get started writing a little script that will take care of synchronising my library with my google music one, and automatically uploading those that it can't find a match for. A few of my friends also use it, so I was also thinking of making a little tool that would allow us to compare our libraries and show us what each other are missing etc.
This would be great help when trying to dj dancing party: now show me a list of "blues", "chicago", "slow", "with breaks" to choose the next song. Actually in this context, separate service / app would be great - it would work on a mobile device, rather than just desktop.
(a long standing idea on spotify list already: https://community.spotify.com/t5/Spotify-Ideas/Tag-Music/idi...)