Chord Distribution Analysis

Chord SymbolCountFrequency
Fm6750.0%
Bbm7214.3%
C7b9214.3%
F7b917.1%
Db717.1%
Gm7b517.1%

Key Patterns Detected

PatternFunctionFrequency
F7b9 -> Bbm7Resolution (Minor)1
C7b9 -> Fm6Resolution (Minor)1
Gm7b5 -> C7b9Setup (Minor Key)1

Harmonic Highlights

  • Minor Blues Structure: Operates as a 12-bar minor blues in F minor, despite the prompt’s major key designation.
  • Secondary Dominant: The F7b9 in bar 4 functions as a V7/iv, creating a strong chromatic pull toward the Bbm7 subdominant.
  • Chromatic Turnaround: Uses a bVI7 (Db7) to V7b9 (C7b9) progression, a common jazz substitution for a natural ii-V to return to the tonic.
  • Tonic Extension: The use of Fm6 throughout implies a Dorian or Melodic Minor sound, emphasizing the major 6th (D natural) against the minor triad.

Improvisation Focus F Dorian scale to accommodate the tonic minor 6th and the standard minor blues changes.

Difficulty Rating 2/5: The 12-bar form is predictable, though the minor-key alterations and bVI-V movement require fundamental knowledge of voice leading.


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The Real Book - Volume I
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