Chord Distribution Analysis

Chord SymbolCountFrequency
Bbmaj7520.8%
Gm7416.7%
Cm7416.7%
F7416.7%
Fm714.2%
Bb714.2%
Ebmaj714.2%
Ebm714.2%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)4
F7 -> Bbmaj7Resolution (Major)4
Fm7 -> Bb7Setup (Major Key)1
Bb7 -> Ebmaj7Resolution (Major)1
D7b9 -> Gm7Resolution (Minor)1

Harmonic Highlights

  • Employs a foundational I-vi-ii-V (Bbmaj7-Gm7-Cm7-F7) turnaround, establishing a strong diatonic framework.
  • Utilizes a secondary ii-V (Fm7-Bb7) to tonicize the IV chord (Ebmaj7), expanding the harmonic palette beyond the home key.
  • Incorporates a minor IV (Ebm7) and a chromatic passing diminished chord (Dbยฐ7) to facilitate smooth linear voice-leading back to the ii-V.

Improvisation Focus Bb Major Bebop scale, specifically targeting the b6 (Gb) over the Ebm7 and the b3 (Db) over the diminished passing chord.

Difficulty Rating 2/5: The progression relies on standard functional harmony and predictable cycle-of-fourths resolutions, making it highly accessible for intermediate improvisers.


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The Real Book - Volume III
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