For many, playlists are the new radio. But who has the time to endlessly sort all of the tracks you've added into a pleasing order or re-order them when you want a change? Spotify is offering a solution to this universal problem with a new web app developed by The Echo Nest team dubbed "Sort Your Music." Sort Your Music lets users sort playlists and save them based Echo Nest parameters: Energy - The energy of a song - the higher the value, the more energtic. song Danceability - The higher the value, the easier it is to dance to...

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