Chord Distribution Analysis

Chord SymbolCountFrequency
F7b9816.3%
C7b9510.2%
Fm48.2%
Db748.2%
Gb748.2%
Bbm36.1%
Bbm6/F36.1%
Gm7b524.1%

Key Patterns Detected

PatternFunctionFrequency
F7b9 -> Bbm6/FResolution (Minor)3
Bbm6/F -> F7b9Setup (Major Key)3
C7b9 -> FmResolution (Minor)2
F7b9 -> Bbm7Resolution (Minor)2
F7b9 -> BbmResolution (Minor)1
Bbm -> Eb7b9Setup (Major Key)1
C7b13/E -> FmResolution (Minor)1
Dm7b5 -> G7b9Setup (Minor Key)1
Bbm7 -> Eb7Setup (Major Key)1
Gm7b5 -> C7b9Setup (Minor Key)1
Bb7 -> Ebm7Resolution (Minor)1
Ebm7 -> Ab7Setup (Major Key)1

Harmonic Highlights

  • The progression utilizes a strong i–iv–V foundation in F minor, frequently embellished by secondary dominants like F7b9 leading to the subdominant Bbm.
  • A brief modulation to the relative major occurs through a ii-V-I sequence (Bbm7–Eb7–Ab6), providing a temporary tonal shift from the somber tonic.
  • The use of inversions such as G7b9/F and C7b13/E facilitates a smooth, chromatic descending bass line, a hallmark of John Lewis’s neoclassical influence.
  • The turnaround employs a “V of V” secondary dominant (Dm7b5–G7b9) to build tension before resolving through the primary dominant C7b9 back to Fm.

Improvisation Focus Mastering Minor ii-V-I vocabulary and the F Melodic Minor scale to navigate the dense, shifting dominant resolutions.

Difficulty Rating 4/5: The complex, asymmetrical phrase lengths and frequent secondary dominants require advanced melodic control and harmonic precision.


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The Real Book - Volume I
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