Chord Distribution Analysis

Chord SymbolCountFrequency
Ebmaj7413.8%
C7413.8%
F7413.8%
Fm7413.8%
Bb7413.8%
Abm7310.3%
Db7310.3%
Eb726.9%

Key Patterns Detected

PatternFunctionFrequency
Fm7 -> Bb7Setup (Major Key)4
Abm7 -> Eb7Setup (Major Key)2
Bb7 -> Ebmaj7Resolution (Major)2
Abm7 -> Db7Setup (Major Key)1
C7 -> Fm7Resolution (Minor)1

Harmonic Highlights

  • Frequent use of “backdoor” ii-V progressions (Abm7 – Db7) resolving to the Ebmaj7 tonic, providing a distinctive subdominant minor color.
  • Extended secondary dominant chains (C7 – F7 – Bb7) that drive harmonic motion through the circle of fifths toward the turnaround.
  • Tonicization of the IV chord (Abmaj7) via its related ii-V (Bbm7 – Eb7), a classic bebop device for shifting tonal gravity.
  • Rapid oscillation between the tonic and parallel minor substitutions, requiring swift shifts between Eb major and Eb mixolydian/dorian vocabularies.

Improvisation Focus Chromatic guide-tone targeting over secondary dominant cycles.

Difficulty Rating 3/5: The standard AABA form is accessible, but navigating the frequent secondary dominants and backdoor resolutions at bebop tempos requires intermediate linear control.


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The Real Book - Volume II
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