The opening chord of “A Hard Day’s Night” (The Endeavour)
The opening chord in Hard Day’s Night is an interesting problem. We just had it as a challenge problem in my Master’s Program in Applied Math. I am not completely convinced however that he found the notes played. There is a difference in what notes are played and what notes are heard. When you play a note on a guitar, you are not getting a single pitch. You get a bunch of overtones (http://en.wikipedia.org/wiki/Overtone) as well.After saying this, I should mention that I didn’t read the article or listen to the Mathematical Moments podcast. He might have a sane method of identifying overtones.