Rdios CEO, Anthony Bay, doesnt want Spotify knowing what it knows, and to that end, the music service is looking to break away from Echo Nest. However, the music intelligence company, recently bought by Spotify, is just one of several partners that Rdio taps for its music data, including Rovi. Spotify has previously said that itll run Echo Nest as a wholly run subsidiary which should keep the data service relatively free from any meddling.