Chord Distribution Analysis

Chord SymbolCountFrequency
Ab7616.7%
G7513.9%
D7411.1%
Cm6411.1%
F7411.1%
Bb7411.1%
Ebmaj725.6%
Eb725.6%

Key Patterns Detected

PatternFunctionFrequency
G7 -> Cm6Resolution (Minor)4
Cm6 -> F7Setup (Major Key)2
Bb7 -> Ebmaj7Resolution (Major)2
Ab7 -> Dbmaj7Resolution (Major)1

Harmonic Highlights

  • The A section utilizes a minor ii-V-i (D7-G7-Cm6) followed by a “backdoor” ii-V (F7-Bb7) resolving to the relative major, Ebmaj7.
  • The bridge features a rapid sequence of secondary dominants moving through the Cycle of Fourths (C7-F7-Bb7-Eb7-Ab7) to reach a distant Dbmaj7.
  • Chromatic “side-slipping” is prominent, specifically the shift from Ab7 to G7, which serves as a tritone substitute or a chromatic approach to the primary dominant.

Improvisation Focus Mastering the Altered Scale (Super Locrian) to navigate the frequent secondary dominant chords and their resolutions throughout the bridge and turnaround.

Difficulty Rating 3/5: The A section is standard minor-key vocabulary, but the bridge requires high-speed harmonic navigation through multiple fleeting tonal centers.


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The Real Book - Volume I
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