Chord Distribution Analysis

Chord SymbolCountFrequency
Eb7512.8%
Ab410.3%
Ab/Gb410.3%
Ab/F410.3%
Ab/Eb410.3%
Db410.3%
Ab/C410.3%
Bbm737.7%

Key Patterns Detected

PatternFunctionFrequency
Bbm7 -> Eb7Setup (Major Key)3

Harmonic Highlights

  • Employs a chromatic descending bass line clichĂ© (Ab, Ab/Gb, Ab/F, Ab/Eb) over the tonic, functioning as an elaborated I chord leading to the IV (Db).
  • Utilizes a classic “Cycle of Dominants” sequence (C7–F7–Bb7–Eb7), navigating through VI7, II7, and V7 to create strong forward momentum.
  • Features a smooth IV to I/3rd (Db to Ab/C) transition, utilizing traditional gospel-influenced voice leading common in early swing standards.

Improvisation Focus Navigating the secondary dominant cycle (VI7–II7–V7) by targeting 3rds and 7ths to outline the rapid harmonic shifts.

Difficulty Rating 2 — The harmonic structure follows predictable swing-era conventions and remains firmly rooted in Ab major, making it highly accessible for intermediate improvisers.


📚 Standard Available in:

The Real Book - Volume VI
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