Chord Distribution Analysis

Chord SymbolCountFrequency
G6614.0%
D7614.0%
Eb749.3%
Fm749.3%
Bb749.3%
Eb649.3%
Cm749.3%
Am737.0%

Key Patterns Detected

PatternFunctionFrequency
Fm7 -> Bb7Setup (Major Key)4
E7b9 -> Am7Resolution (Minor)2
Am7 -> D7Setup (Major Key)1

Harmonic Highlights

  • The progression features a chromatic bVI7 - V7 - I turnaround (Eb7 - D7 - G6), where the Eb7 acts as a tritone substitute for the secondary dominant (A7).
  • Functional modal interchange occurs via the Cm6 (minor iv) in the A section, creating a bittersweet “parallel minor” sentiment within a major context.
  • The bridge employs a decisive modulation to the bVI major (Eb major) through a series of ii-V-I cells (Fm7 - Bb7 - Eb6), shifting the tonal center up a major third from the home key.

Improvisation Focus Modal Interchange Navigation: Specifically, targeting the shift from the G major scale to the G melodic minor (or Dorian) over the Cm6 and the Eb major tonality of the bridge.

Difficulty Rating 3/5: While the tempo is usually relaxed, the frequent secondary dominants and the shift to the bVI major require fluid navigation of non-diatonic changes.


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The Real Book - Volume I
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