Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7820.0%
Am7512.5%
Eb7#11410.0%
Dm7410.0%
C737.5%
Fmaj725.0%
D725.0%
D7b1325.0%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)3
Am7 -> D7Setup (Major Key)2
D7b13 -> Gm7Resolution (Minor)2
Em7b5 -> A7b9Setup (Minor Key)1
A7b9 -> Dm7Resolution (Minor)1
Dm7 -> G7Setup (Major Key)1
C7 -> Fmaj7Resolution (Major)1
Bm7b5 -> E7b9Setup (Minor Key)1
E7b9 -> Am7Resolution (Minor)1

Harmonic Highlights

  • The Eb7#11 (bVII7) creates a Lydian Dominant tension that subverts traditional IV chord expectations, providing a “back-door” harmonic flavor that resolves indirectly.
  • A clear ii-V-i in D minor (Em7b5 - A7b9 - Dm7) modulates the harmony to the relative minor, creating a somber contrast to the opening major tonality.
  • The sequence of G7 to Gm7 to C7 utilizes a secondary dominant (V/V) to facilitate a chromatic transition back to the primary ii-V-I cadence in F Major.

Improvisation Focus F Major / G Dorian, with a shift to Eb Lydian Dominant to specifically target the #11 and natural 13 tensions on the bVII chord.

Difficulty Rating 3/5. While the tempo is often moderate, the performer must navigate frequent shifts between the major tonic and the relative minor key center.


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The Real Book - Volume IV
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