In my view, “Blackbird,” a Beatles song written by Paul McCartney and released on the Beatles’ “White Album” in November, 1968, is one of his finest works. Here we see him rehearsing it in the the EMI’s Abbey Road Studios on the very day it was recorded: June 11, 1968. (The released version is here.)
A few notes on the song from Wikipedia:
McCartney explained on Chaos and Creation at Abbey Road that the guitar accompaniment for “Blackbird” was inspired by Johann Sebastian Bach’s Bourrée in E minor, a well-known lute piece, often played on the classical guitar. As teenagers, he and George Harrison tried to learn Bourrée as a “show off” piece. The Bourrée is distinguished by melody and bass notes played simultaneously on the upper and lower strings. McCartney said that he adapted a segment of the Bourrée (reharmonised into the original’s relative major key of G) as the opening of “Blackbird”, and carried the musical idea throughout the song. The first three notes of the song, which then transitioned into the opening guitar riff, were inspired from Bach.
The first night his future wife Linda Eastman stayed at his home, McCartney played “Blackbird” for the fans camped outside his house.
. . . Since composing “Blackbird” in 1968, McCartney has given various statements regarding both his inspiration for the song and its meaning. He has said that he was inspired by hearing the call of a blackbird one morning when the Beatles were studying Transcendental Meditation in Rishikesh, India, and also writing it in Scotland as a response to the Little Rock Nine incident and the overall civil rights movement, wanting to write a song dedicated to people who had been affected by discrimination.
You can listen to Bach’s Bourré here, but for the life of me I can’t hear the germ of “Blackbird” in it.
The sound is off at the beginning but starts 16 seconds in. There are a few other breaks in the sound.
It’s clear that the song was tweaked right up to the end, including the tempo, the pause, and the raising of the voice on the word “life” halfway into the song.
The guy speaking to John and Paul is of course George Martin, who contributed so much to the greatness of the group’s songs. Notice that Paul breaks into other songs from time to time, including Helter Skelter and Mother Nature’s Son, both also on the White Album. At about 6:15, Lennon tunes his guitar to McCartney’s, as if wanting to accompany him on Blackbird. But no accompaniment was needed.
Check out Macca’s shoes! The woman sitting in the corner and then next to McCartney is identified by a commenter:
This is McCartney at the apogee of his powers. The song is a work of genius. In all my life I will never figure out where the ability to produce songs like this comes from. All I can guess is that there’s a kind of neuronal wiring in such people that can turn thoughts into wonderful music.

From what I recall, the Diamonds were a conventional vocal group who recorded “Little Darlin'” at the end of a session as a kind of joke song – a parody of the Ink Spots and Mills Brothers. Fortunately for them, the studio musicians joined in with perfectly irresistible beat and the song became a rock and roll hit. Early rock and roll was born as parody as much as anything else, like Elvis’s Jokey rendition of Bill Monroe’s “Blue Moon of Kentucky” turning out to be the founding document of rockabilly.