British trip-hop heavyweight Massive Attack tried something interesting in 2009: it released an EP, Splitting the Atom, of remixes of songs from a forthcoming album. Remixes first? The notion isn’t as offensive to me as say eating dessert before the main course is. I find it creative, in fact. But I don’t know what it does to the meaning of a “definitive version” of a song. Maybe obscuring the whole question is what Massive Attack had in mind.