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Related Music Theory Alchemy

The “Glory Box” by Portishead chorus progression is based in D minor and moves between this primary D minor chord and three other chords: Dm/C, Bm7b5, and Bbmaj7. The Dm/C chord is the same as the D minor, but with a different note in the bass (C). The Bm7b5 is a half-diminished chord. The Bbmaj7 is major seventh chord.

“Roads” by Portishead is set in the key of Am, also known as A minor. In the verse, there is an interesting use of the flat major 7 (Fmaj7) chord. This chord is not typically found within the natural minor key but is considered a borrowed chord from the A major key. Thus, this use of said borrowed chord and its resolution to the E7 dominants gives the song a unique feel, contributing to its mesmerizing and emotive ambience. Portishead tends to blend the use of A minor and A Dorian modality in their music, especially apparent in this composition.

“Brown Sugar” by The Rolling Stones is based in the key of C major. The verse has a simple and catchy chord progression that primarily revolves around the I and IV chords in the key, with brief excursions to the dominant and a borrowed chord from the parallel minor key. This structure contributes to the song’s bluesy and rock’n’roll sound.

The song “Don’t Let the Sun Go Down on Me” by Elton John is brilliantly harmonized, showcasing the great musical arrangement skills of John at his best. Primarily, the song is based in the key of C Major and uses a variety of moving bass lines over mostly diatonic chords in the verses and choruses. There are some key modulations and borrowed chords that give the harmony a rich and complex quality which sets it apart from many contemporary pop songs.

Verse

“Kiss” by Prince is a well-loved song known for its catchy tune and funky, upbeat style. The song is composed in the key of A major. However, it lacks typical diatonic major harmonies because Prince used power chords (fifth chords) instead of full major or minor chords. The progression is largely built around the ‘A5’ and ‘D5’ power chords, with the occasional ‘E5’ and ‘E9sus4’ worked in to add some variation.

Portishead – Glory Box – Verse 1

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Chord Progression

[‘Dm’, ‘Dm/C’, ‘Bm7b5’, ‘Bbmaj7’, ‘Dm’, ‘Dm/C’, ‘Bm7b5’, ‘Bbmaj7’, ‘Dm’, ‘Dm/C’, ‘Bm7b5’, ‘Bbmaj7’]

Chord Progression Analysis

“`
Dm (‘i’)
Dm/C (‘i with VII in bass’)
Bm7b5 (‘vi half-diminished 7’)
Bbmaj7 (‘VII Seventh Major’)
“`

Similar Chord Progressions

A similar chord progression can be found in Radiohead’s “Paranoid Android” where the verse progression is Cm, Cm/B, Bm7b5, Bb7. They share similar elements including the mixed usage of major 7, diminished 5 and chromatic scale.

An exact track with this same progression is unlikely due to the rather unique nature of the progression, but songs in the same genre may share a similar mood. You will find many songs with similar vibes in the trip-hop genre, for example Massive Attack’s “Teardrop”.

Musical Analysis

Starting with a Dm chord, the song immediately gives a minor key atmosphere. The use of the Dm/C transition chord adds more tension, leading into the Bm7b5 which is a half-diminished chord and further adds to the tension and dark coloring of the piece. Lastly, the Bbmaj7 seems like a satisfying resolution after the tension built up but being a major chord, it adds a slightly bitter-sweet touch.

Overall Analysis

“Glory Box” by Portishead is a Trip Hop masterpiece which blends elements of blues, rock, soul, and electronic music together in an innovative and influential way. The song’s chord progression, as illustrated by the verse, is D minor, D minor with C in the bass (notated as Dm/C), B minor 7 flat 5, and B flat major 7. This particular chord progression gives an overall melancholy and haunting feeling throughout the song and sets the tone for the track.

Style Analysis

“Glory Box”, like many trip-hop songs from the 90s, uses chromaticism and a minor key to elicit a melancholic mood, and combines this with sampled beats and electronica influences to create a darker sound. The use of minor and diminished chords, dominant sevenths and transitions demonstrate the jazz and blues elements often found in the genre.

Chords in the Verse 1 section of Glory Box by Portishead are:

[‘Dm’, ‘Dm/C’, ‘Bm7b5’, ‘Bbmaj7’, ‘Dm’, ‘Dm/C’, ‘Bm7b5’, ‘Bbmaj7’, ‘Dm’, ‘Dm/C’, ‘Bm7b5’, ‘Bbmaj7’]