!! IMPORTANT : Because of the acquisition of The Echo Nest by Spotify, they have decided to discontinue their existing API in favor of 3 new API's that combine the capabilities of Echo Nest and Spotify. Therefore, as of May 31 2016, the Echo Nest platform will no longer serve legacy API requests. So... some of my tools here may not work right until I have time to update them. Not sure when that might be. Thanks!