Chord Distribution Analysis

Chord SymbolCountFrequency
Bbmaj7514.7%
Cm7411.8%
F7411.8%
Dm7411.8%
Db0738.8%
Em7b538.8%
A7b938.8%
Bb725.9%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)4
Em7b5 -> A7b9Setup (Minor Key)3
A7b9 -> Dm7Resolution (Minor)3
Bb7 -> Ebmaj7Resolution (Major)2
F7 -> Bbmaj7Resolution (Major)2
Dm7 -> G7Setup (Major Key)1
G7 -> Cm7Resolution (Minor)1

Harmonic Highlights

  • Features a subdominant minor move (Ebmaj7 to Ebm6) in the A section, creating a classic IV-iv-I resolution pattern.
  • The bridge executes a functional modulation to the mediant key (D minor) via successive minor ii-V-i progressions (Em7b5 - A7b9 - Dm7).
  • Employs a chromatic $bIII^{\circ 7}$ ($Db^{\circ 7}$) passing chord to facilitate smooth voice leading between the tonic Bbmaj7 and the supertonic Cm7.

Improvisation Focus Navigating the D Harmonic Minor scale over the bridge’s repetitive minor ii-V-i cycles to highlight the $A7(b9)$ tension.

Difficulty Rating 3/5. While the A sections are standard diatonic fare, the bridge’s sustained modulation to the mediant minor key requires intermediate-level knowledge of altered dominant resolutions.


📚 Standard Available in:

The Real Book - Volume V
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