Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7616.7%
Fmaj7513.9%
C738.3%
Ab738.3%
Gb738.3%
Bm7b525.6%
E7b925.6%
Am725.6%

Key Patterns Detected

PatternFunctionFrequency
C7 -> Fmaj7Resolution (Major)3
Gm7 -> C7Setup (Major Key)2
Bm7b5 -> E7b9Setup (Minor Key)2
E7b9 -> Am7Resolution (Minor)2
Am7b5 -> D7b9Setup (Minor Key)2
Cm7 -> F7Setup (Major Key)1
F7 -> Bbmaj7Resolution (Major)1
D7b9 -> Gm7Resolution (Minor)1
Ab7 -> Dbmaj7Resolution (Major)1
Dbmaj7 -> Gb7Setup (Major Key)1

Harmonic Highlights

  • Employs a secondary ii-V sequence (Bm7b5โ€“E7b9) to modulate momentarily toward the iii chord (Am7), adding harmonic depth to the F major tonality.
  • Utilizes a chromatic descending dominant chain (Am7โ€“Ab7โ€“Gm7โ€“Gb7) as a series of tritone substitutions to smoothly approach the IV chord (Bbmaj7).
  • Integrates minor ii-V-i cells (Am7b5โ€“D7b9โ€“Gm7) which introduce hard-bop tension and darker subdominant colors within a predominantly major framework.
  1. Improvisation Focus Continuous guide-tone voice leading through fast-moving secondary dominants.

  2. Difficulty Rating 3/5: The progression follows a logical flow, but the frequent shift between major and minor ii-V cells requires intermediate-level harmonic precision.


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The Real Book - Volume II
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