Very interesting read, thank you. ----- Original Message ----- From: "bob" To: canadianclassicrock@yahoogroups.com, canuckblues@yahoogroups.com, "audities" , "Warren Cosford" Sent: Saturday, February 28, 2009 10:44:14 PM GMT -08:00 US/Canada Pacific Subject: The opening chord of "A Hard Day's Night." From an old friend. A great writer and guitarist from Seattle that led a womderful band called the Daily Flash that would have been the next big thing out of L.A if their bass player/lead vocalist hadn't have o.d'd on heroin on a bus stop in Hollywood. bib     From the “How Did they Do That?” department.    Steve http://www.marginalrevolution.com/marginalrevolution/20... It's sometimes called "the most famous chord in rock n' roll." I have wondered about this question for thirty-four years (all this time I'd been thinking it is an odd hybrid G7/9/13). Here is a history of thought on the controversy, including a list of nominated chords. It now turns out there is an answer. A mathematician applied Fourier transforms to break the sound into its constituent parts. Here's the bottom line: The Beatles producer added a piano chord that included an F note, impossible to play with the other notes on the guitar. The resulting chord was completely different than anything found in songbooks and scores for the song, which is one reason why Dr. Brown’s findings garnered international attention. He laughs that he may be the only mathematician ever to be published in Guitar Player magazine. Here is a pdf of the researcher's findings. I thank Eric H. for the pointer.   ____________________________________________________________