Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7937.5%
Cm728.3%
F728.3%
Eb728.3%
D728.3%
Bbm714.2%
Am714.2%
Ebm714.2%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)2
F7 -> Bbm7Resolution (Minor)1
Bbm7 -> Eb7Setup (Major Key)1
Am7 -> D7Setup (Major Key)1
Ebm7 -> Ab7Setup (Major Key)1
F7 -> Bbmaj7Resolution (Major)1
D7 -> Gm7Resolution (Minor)1
Am7b5 -> D7b9Setup (Minor Key)1

Harmonic Highlights

  • The composition utilizes a G minor tonic ostinato, establishing a modal foundation before transitioning into dense functional harmony.
  • Rapid, non-diatonic ii-V sequences (Cm7-F7, Bbm7-Eb7, Am7-D7, Ebm7-Ab7) descend chromatically and via whole steps, creating intense harmonic tension.
  • The Ebm7-Ab7 cell acts as a chromatic “side-slipping” mechanism, functioning as a backdoor turnaround to resolve back to the Gm7 tonic.
  1. Improvisation Focus Navigating shifting ii-V arpeggios while maintaining the G Dorian/Melodic Minor tonal center.

  2. Difficulty Rating 4/5: The high-speed execution of unrelated, descending ii-V patterns requires advanced harmonic fluency and precise linear connection.


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The Real Book - Volume I
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