Chord Distribution Analysis

Chord SymbolCountFrequency
C7sus612.5%
Fmaj748.3%
Gm748.3%
G736.2%
G7#536.2%
Cm724.2%
F724.2%
Bbmaj724.2%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7susSetup (Major Key)4
C7sus -> Fmaj7Resolution (Major)3
Cm7 -> F7Setup (Major Key)2
F7 -> Bbmaj7Resolution (Major)2
A7b13 -> Dm7Resolution (Minor)2
Dm7 -> G7Setup (Major Key)2
Bm7b5 -> E7b13Setup (Minor Key)1
E7b13 -> Am6Resolution (Minor)1
G7 -> Cm6Resolution (Minor)1
Dm7b5 -> G7b13Setup (Minor Key)1
G7b13 -> Cm6Resolution (Minor)1

Harmonic Highlights:

  • The progression utilizes secondary ii-V-I cycles (Cm7-F7 to Bbmaj7) to tonicize the bVII, expanding the harmonic palette beyond diatonic C major.
  • It integrates a sophisticated vi-key turnaround (Bm7b5-E7b13 to Am6) which leverages melodic minor colors to create operatic tension.
  • The strategic use of C7sus functions as a V7/IV, softening the resolution to the subdominant and maintaining a lush, suspended atmosphere.
  • Chromaticism via Ab7#5 acts as an altered dominant or bVI7 substitute, facilitating smooth voice leading back to the primary tonal center.
  1. Improvisation Focus: Chord-scale theory focusing on Melodic Minor modes (specifically Locrian #2 and Altered scales) to navigate the frequent minor ii-V-I transitions.

  2. Difficulty Rating: 4: The tune requires advanced harmonic awareness to navigate rapid tonal shifts and complex altered extensions while maintaining the lyrical sensitivity of a ballad.


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The Real Book - Volume V
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