When it comes to today's guests, mystery is the name of the game. The band's name is the symbol of a triangle. It's pronounced alt-J. You won't find pictures of the three stars of the band very many places - certainly not on the cover of its new record, which features a drawing of an anonymous red body on the side of a highway. And not in the music video for the album's first single, which stars a scurrying wood mouse.
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