Chord Distribution Analysis

Chord SymbolCountFrequency
Fm7412.5%
C7b9412.5%
Dm7b539.4%
Bb726.2%
G7#926.2%
Am7b526.2%
G7b926.2%
Ebmaj713.1%

Key Patterns Detected

PatternFunctionFrequency
C7b9 -> Fm7Resolution (Minor)3
Fm7 -> Bb7Setup (Major Key)2
Dm7b5 -> G7#9Setup (Minor Key)2
Bb7 -> Ebmaj7Resolution (Major)1
G7#9 -> CmResolution (Minor)1
A7b5 -> Dm7b5Resolution (Minor)1
G7#9 -> Cm7Resolution (Minor)1
Am7b5 -> D7b9Setup (Minor Key)1
Dm7b5 -> G7b9Setup (Minor Key)1
Am7b5 -> D7altSetup (Minor Key)1
Gm7b5 -> C7b9Setup (Minor Key)1
Fm7 -> C7b9Setup (Major Key)1
Abm7 -> Db7Setup (Major Key)1

Harmonic Highlights

  • The progression begins with a diatonic cycle of fourths (iv7 - VII7 - IIImaj7 - VImaj7), momentarily implying Eb major before resolving back to the tonic C minor.
  • Frequent minor ii-V-i cadences (Dm7b5 - G7alt - Cm) demand careful navigation of the altered dominant tensions (b9, #9, b13) to resolve to the tonic.
  • A secondary ii-V (Am7b5 - D7alt) functions as a turnaround to the dominant G7, creating a “V of V” motion that heightens the harmonic tension.
  • Voice-leading is enhanced by a descending bass line cliché (Cm - Cm/Bb - Am7b5), facilitating a smooth transition from the tonic to the D dominant chord.

Improvisation Focus C Harmonic Minor, as it provides the necessary leading tone (B natural) for the G7alt chords and fits the minor ii-V-i resolutions.

Difficulty Rating 2/5. The slow ballad tempo and predictable cycle-of-fourths movement make it accessible, though players must master minor-key functional harmony.


📚 Standard Available in:

The Real Book - Volume VI
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