Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7920.5%
C7818.2%
F649.1%
D7#936.8%
Bb724.5%
Am724.5%
D7b924.5%
Fmaj712.3%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)8
Am7 -> D7#9Setup (Major Key)2
D7#9 -> Gm7Resolution (Minor)2
C7 -> Gm7Resolution (Minor)2
D7b9 -> Gm7Resolution (Minor)2
C7 -> Fmaj7Resolution (Major)1
Bm7b5 -> E7b9Setup (Minor Key)1
E7b9 -> Amaj7Resolution (Major)1
Bm7 -> E7Setup (Major Key)1
D7b13 -> Gm7Resolution (Minor)1
Em7b5 -> A7#9Setup (Minor Key)1
A7#9 -> Dm7Resolution (Minor)1
Dm7 -> G7Setup (Major Key)1

Harmonic Highlights

  • Employs frequent ii-V-I progressions in F Major, establishing a stable tonal center that contrasts with the D minor key signature.
  • Incorporates a distinct modulation to A Major using a Bm7b5 - E7b9 - Amaj7 sequence, shifting the harmonic palette briefly to a brighter, parallel key context.
  • Uses the Bb7 as a backdoor dominant, providing chromatic interest and a smooth transition back to the F Major tonic.
  • Features secondary dominants (D7 alt) to tonicize the Gm7 (ii) chord, creating strong internal resolutions and driving the rhythmic forward motion.

Improvisation Focus Navigating ii-V-I cycles through F Major and the temporary modulation to A Major using corresponding Major and Melodic Minor scales.

Difficulty Rating 2/5: The structure is a standard 32-bar form with clear resolutions, making it accessible for intermediate players to practice basic key center shifting.


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The Real Book - Volume II
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