The Beatles- Because

One of the best examples of John Lennon, Paul McCartney, and George Harrison's harmonizing, Because. The song begins with electric harpsichord played by George Martin and then joined by Lennon's guitar doubling the harpsichord and played through a Leslie speaker. Vocals and bass guitar enter in what Alan Pollack calls the “mini-bridge.“ The song was one of the few Beatles songs to include an analog synthesizer arrangement (although analog keyboards such as the Mellotron had been used often by The Beat