Chord Distribution Analysis

Chord SymbolCountFrequency
F6511.6%
Gm7511.6%
Fmaj7511.6%
C7511.6%
Ab0749.3%
Bbmaj724.7%
Bb7#1124.7%
F/A24.7%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)3
Gm7 -> C7susSetup (Major Key)1
C7sus -> Fmaj7Resolution (Major)1
Cm7 -> F7Setup (Major Key)1
F7 -> Bbmaj7Resolution (Major)1
Bbm7 -> Eb7Setup (Major Key)1
C7 -> Fmaj7Resolution (Major)1
Fmaj7 -> Bb7#11Setup (Major Key)1
Bb7#11 -> Fmaj7Resolution (Major)1
Bm7b5 -> E7b9Setup (Minor Key)1
E7b9 -> Am7Resolution (Minor)1

Harmonic Highlights

  • Uses a passing Ab°7 (#ii°7) to create chromatic voice-leading between the tonic F6 and the supertonic Gm7.
  • Features a sudden tonicization of the bIII key (Ab major) via a Bbm7-Eb7-Ab6 sequence, introducing sophisticated modal borrowing.
  • Employs the secondary dominant G7b9 (V/V) to heighten tension before resolving to the primary C7 dominant.
  • Incorporates the Bb7#11 chord, utilizing Lydian Dominant colors as a colorful subdominant variation.

Improvisation Focus Guide-tone targeting across shifting ii-V-I cells in F Major and the temporary Ab Major modulation.

Difficulty Rating 3/5. The tune is accessible but requires navigating rapid key shifts and diminished substitutions while maintaining a fluid swing feel.


📚 Standard Available in:

The Real Book - Volume III
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