Chord Distribution Analysis

Chord SymbolCountFrequency
F1235.3%
Gm7514.7%
C7514.7%
Bb38.8%
Bbm25.9%
Am725.9%
D725.9%
Cm712.9%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)4
D7 -> Gm7Resolution (Minor)2
Am7 -> D7Setup (Major Key)1
Cm7 -> F7Setup (Major Key)1

Harmonic Highlights

  • The progression utilizes a foundational I-ii7-V7 (F-Gm7-C7) turnaround, typical of American Songbook anthems to establish a strong tonal center.
  • A “minor iv” substitution occurs via the Bb to Bbm movement, providing smooth chromatic voice leading (D to Db to C) back to the tonic.
  • The sequence employs a secondary dominant via the iii7-VI7-ii7 progression (Am7-D7-Gm7), utilizing a cycle of fourths to create forward momentum.
  • The structure relies on a rhythmic “vamp” on the F major tonic, emphasizing the iconic “showtune” syncopation.

Improvisation Focus F Major Bebop Scale (incorporating the b6/Db to navigate the Bbm chord transitions).

Difficulty Rating 2/5. The harmony follows predictable functional patterns and standard secondary dominants, making it highly accessible for intermediate improvisers.


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The Real Book - Volume VI
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