The term "retrograde" has just been re-popularised by James Blake, who named the best track on his Mercury Prize winning album Overgrown after it, but it's safe to say #XI like Blake for a lot more than his phraseology.

They're orbiting beside the British musician, using the same ethereal, manipulated vocals, and samples that sound like re-recordings. They say imitation is the highest form of flattery, but most copycats don't have this kind of talent.

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