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The song “Penny Lane” written by the Beatles is in the key of A major. The structure of Verse 4, specifically, has a very effective use of both diatonic (belonging naturally to the key) and borrowed chords (taken from a different key or mode). They have incorporated secondary dominants, pivot modulation, and modal interchange which reflect their knowledge of musical theory and compositional skills.

“All My Loving” by The Beatles is written in the key of D Major. It’s pop and rock style includes elements of British Invasion and Merseybeat. It shows a common chord progression modified with additional chords and modulation.

“For No One” is a song from The Beatles’ album Revolver, released in 1966. The song has a melancholic theme, represented quite well through a sophisticated chord progression that features significant use of the minor scale and infrequent use of chord extensions, such as 7th and suspended chords. It’s written primarily in C Major, but the chorus alternates between D Minor and A7, an interesting modal shift (Using structural chords from different modes).

The chorus of “Hate This And I’ll Love You” by Muse features a highly chromatic and non-diatonic chord progression, with a myriad of borrowed chords and some distinctive rock sound. The key within which the progression is based seems to shift between E minor and B minor, with a mixture of Major and minor chords throughout.

The chord progression in the chorus of Radiohead’s “Knives Out” is an interesting and unconventional one, making use of some borrowed chords and a mix of major and minor tonalities. The overall style of the song can be described as alternative rock with some influences of jazz harmony and chromaticism, creating a unique and moody atmosphere. The progression is mostly diatonic, but it also incorporates some borrowed chords from parallel modes to add color and tension.

The Beatles – Penny Lane – Chorus

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Chord Progression

[‘G’, ‘Bm’, ‘C’, ‘G’, ‘Bm’, ‘C’, ‘G’, ‘Bm’, ‘C’, ‘E7’]

Chord Progression Analysis

Here, we will analyze the given section of the chorus against the context of the key of A major:
“`
G Major: bVII
B Minor: ii
C Major: bIII
G Major: bVII
B Minor: ii
C Major: bIII
G Major: bVII
B Minor: ii
C Major: bIII
E7: V/vi
“`
The above chords contains borrowed chords which are chords borrowed from the parallel minor key, In the key of A major, the parallel minor is A minor. So, the G and C chords are borrowed from A minor.

Here’s the line with borrowed chords written in code block:

“`G Major (bVII), C Major (bIII)“`

Similar Chord Progressions

The Beatles’ use of borrowed chords and key changes was influential and can be seen in many songs by other artists. For example, the Beach Boys’ “God Only Knows” uses similar techniques. In particular, “Uncle Albert/Admiral Halsey” by Paul McCartney also utilizes a similar style of chord borrowing and modulations.

Chord progression in these songs:

“God Only Knows” by The Beach Boys:

“`C (I), E7 (V/vi), F (IV), D (bII)“`

“Uncle Albert/Admiral Halsey” by Paul McCartney:

“`G (I), E7(V/vi), A7 (dominant V)“`

Musical Analysis

Notably, the primary chords in the progression (G and C) are not part of the A major scale. “Penny Lane” is characteristically Beatles-esque in its use of unexpected chord movements and key changes, which add intrigue to the piece without making it sound disjointed or random. The use of the V/vi (E7) chord as a pivot to transition between key areas is very nicely done and is an excellent example of the Beatles’ clever songwriting.

Overall Analysis

“Penny Lane,” written by the Beatles, utilizes key changes and borrowed chords to create an interesting and complex tonal palette. The song is best understood to primarily be in the key of A Major; however, it frequently borrows chords from the parallel minor key, uses unexpected dominant chords, and briefly modulates to other key areas for color and variety. This is characteristic of several Beatles songs, and it’s one of the ways they added complexity to their music while still remaining accessible.

Style Analysis

“Penny Lane” is characterized stylistically by its lush arrangements, complex harmonies, and stylistic mixture of traditional ‘pop’ songwriting, classical influence (particularly Baroque), and modern recording techniques. The section of the chorus analyzed here exemplifies this, with the borrowed chords adding unexpected color to the progression and the E7 resolving back to the home key in a satisfying manner.

Chords in the Chorus section of Penny Lane by The Beatles are:

[‘G’, ‘Bm’, ‘C’, ‘G’, ‘Bm’, ‘C’, ‘G’, ‘Bm’, ‘C’, ‘E7’]