Enhancing the Spotify track tags with my own tags

[umihesh]

Hi everyone,

I want to build an app which can recommend Spotify tracks based on the user's own library of music (could be a user's collection of .mp3). For this, I want to enhace the default tags for Spotify tracks with my own self-crafted tags (say, how many people are there in a song, what instruments are there, what type of beat). 

I have my tools that can generate such tags given an .mp3 file. Now, I need a way to tag the Spotify tracks, so that I could recommend them to a user based on their library. The problem is that I cannot just download tracks from Spotify to generate my demanded tags - I am not sure if it's possible and legal.

I would conclude that it's not doable at all, however I have stumbled upon on a web-app that actually does exactly this: Cianite. I see, that they somehow populate their library of analyzed Spotify tracks, adding their own tags to the music, and I am not sure how they do it. Do you guys have any ideas on how they may do it? Is there some private Spotify API that allows for downloading their catalogue? 

[henrynguyen7]

Hey! You might be interested in TagATrack: https://tagatrack.com/. It lets you do exactly like you're describing here... tag songs with your own self-created tags and then search and filter based on those tags. 

It's not fully available for release yet because we're waiting on approval from Spotify but in the meantime, if you sign up for the mailing list, we can let you know when it's ready! Or, if you want to hit me up and just chat about using the API and building something similar, I'm happy to help too! Let me know! 😇