The Curious Case Of That "Hard Day's Night" Chord

The intro chord to the Beatles' classic has always had an impossible sound: there were allegedly no overdubs, but definitely more notes than John, Paul, and George could've played. Professor Brown of Dalhousie University cracked the chord recently, and it only took him six months and crazy mathematical techniques. The answer? George Martin played five notes on the piano. Finally you can get some sleep. Listen and learn at Wired.

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