VentureBeat reports that a Spotify engineer posted a link to the new, mostly functioning feature on Sunday night.
The Facebook post said: "Ever wondered which artists you would be listening to if you were born in another time? Spotify can help you turn your music back in time, try it out!"
The feature presents you with a list of artists - some of which might not be artists you actually listen to - and you pick three "favourites."
Spotify then takes you back in time, and gives you a tailored playlist from each decade, supposedly based on those selections.
Spotify
Spotify
For now, the feature has some bugs, and sometimes an empty playlist shows up. The pool of artists you originally get to pick from doesn't really change that much. Also, the results are also a little limited considering that Spotify has a catalogue of 30 million songs.
But this is still an unofficial feature, and could have been released to the public too early. The finished add-on could be an attempt to get people to use Spotify in a different way, and remind them of just how much content Spotify actually has, in the face Apple Music's launch.
We reached out to Spotify, but the company has yet to comment on the leaked feature.