Music Theory Alchemy

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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.

“Yesterday” is predominantly composed in the key of F Major. The song is a classic in pop songwriting and showcases the effective use of borrowed chords to capture a unique, nostalgic sound that has made it one of the most covered songs in pop music. Specifically, in this verse, the use of secondary dominants and borrowed chords from the parallel minor key provides the song’s distinctive tonal color.

The chord progression in Kali Uchis’ “Loner” features a mix of major, minor, and augmented chords, which contributes to the song’s unique sound and emotional depth. The progression has an unconventional and intriguing quality, while still maintaining a sense of harmonic coherence.

“Bullet With Butterfly Wings” by The Smashing Pumpkins is an alternative rock song released in 1995. The song is in the key of E minor and primarily uses power chords derived from the E minor scale throughout the song. Power chords or ‘5’ chords, like B5 or G5, don’t have a major or minor quality and are often used in rock music for their strong and neutral sound. The song also applies modal mixture (borrowing chords from parallel keys) for color and tension.

“If You’re Wondering If I Want You To (I Want You To)” by Weezer has a chorus featuring a chord progression in the key of D major. The progression includes chords from both the major and minor scales while still primarily using diatonic chords from D major. The style of the progression is reminiscent of 90s alternative rock, and it finds similarity with other iconic chord progressions in rock music.

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’]