Chord Distribution Analysis

Chord SymbolCountFrequency
Cm7529.4%
G7b9b13529.4%
Dm7b5317.6%
Gb7#1115.9%
Fm715.9%
Eb715.9%
Ab7#1115.9%

Key Patterns Detected

PatternFunctionFrequency
Dm7b5 -> G7b9b13Setup (Minor Key)3
G7b9b13 -> Cm7Resolution (Minor)3
Cm7 -> G7b9b13Setup (Major Key)1

Harmonic Highlights

  • The primary movement is a recurring minor ii-V-i (Dm7b5 โ€“ G7b9 โ€“ Cm7), establishing a clear functional foundation in C minor.
  • The Gb7#11 serves as a tritone substitution for C7, providing a chromatic leading tone into the IV chord (Fm7).
  • A descending stepwise sequence (Fm7 โ€“ Eb7 โ€“ Dm7b5) creates harmonic momentum toward the primary G7b9 dominant.
  • The Ab7#11 acts as a bVI7 chord, utilizing Lydian Dominant textures to intensify the resolution to the V7b9 turnaround.

Improvisation Focus Minor ii-V-i chord-tone targeting.

Difficulty Rating 2/5: The repetitive structure and clear resolutions make it an ideal entry point for learning minor-key improvisation without frequent modulations.


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The Real Book - Volume I
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