Chord Distribution Analysis

Chord SymbolCountFrequency
Dm822.9%
Cm6411.4%
Bbmaj7411.4%
A7b938.6%
C#0725.7%
G7/B25.7%
Ebmaj7#1125.7%
Em7b525.7%

Key Patterns Detected

PatternFunctionFrequency
A7b9 -> DmResolution (Minor)3
Em7b5 -> A7b9Setup (Minor Key)2
Cm6 -> G7/BSetup (Major Key)1
Cm7 -> F7Setup (Major Key)1
Bm7 -> E7b9Setup (Major Key)1

Harmonic Highlights

  • Features a signature chromatic descending bass line (D-C#-C-B-Bb-A) that provides the structural framework for the initial A-section.
  • Employs non-diatonic substitutions, specifically the Ebmaj7#11 acting as a Lydian-inflected bII chord leading toward the ii-V turnaround.
  • Utilizes a Cm6 to G7/B movement, transitioning from a subdominant minor sound to a dominant function via a secondary dominant (V/V).
  • Incorporates symmetrical diminished passing chords (C#o7) and tritone substitutions (Db7) to smooth transitions between functional tonal centers.

Improvisation Focus Voice leading through the chromatic descending bass line, emphasizing the 3rd and 7th guide tones.

Difficulty Rating 3/5: The slow tempo allows time for thought, but the shifting non-diatonic tonalities require sophisticated navigation of chromatic voice leading.


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The Real Book - Volume I
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