Chord Distribution Analysis

Chord SymbolCountFrequency
Cm7b5710.3%
Db745.9%
B745.9%
Abm745.9%
Ebm734.4%
Eb734.4%
Fm734.4%
Bb734.4%

Key Patterns Detected

PatternFunctionFrequency
Cm7b5 -> F7Setup (Minor Key)3
Ebm7 -> Ab7Setup (Major Key)2
Abm7 -> Db7Setup (Major Key)2
Bm7 -> E7Setup (Major Key)2
Fm7 -> Bb7Setup (Major Key)2
F#m7 -> B7Setup (Major Key)2
Am7b5 -> D7#9Setup (Minor Key)1
D7#9 -> Gm7b5Resolution (Minor)1
Gm7b5 -> C7#9Setup (Minor Key)1
C7#9 -> Fm7b5Resolution (Minor)1
Fm7b5 -> Bb7#9Setup (Minor Key)1
Bb7#9 -> Ebm7Resolution (Minor)1
Bb7#5 -> Ebm7Resolution (Minor)1
Bbm7 -> Eb7Setup (Major Key)1
Eb7 -> Abm7Resolution (Minor)1
Db7 -> Abm7Resolution (Minor)1
F7 -> Cm7b5Resolution (Minor)1
B7 -> F#m7Resolution (Minor)1

Harmonic Highlights

  • Sequential minor ii-V chains: Employs a series of descending $ii^{\varnothing}7 - V7(#9)$ movements ($Am7b5$ to $Bb7#9$) that delay resolution through chromatic sequencing.
  • Rapid cycle of fifths: Features dense dominant motion ($Ab7 - Db7 - Gb7 - B7 - Bb7$) creating high harmonic turnover and intense tension.
  • Modal interchange and tonic expansion: Utilizes $Ebm6$ and $Abm7 - Db7$ (subdominant minor) to reinforce the Eb minor tonality while introducing sophisticated, dark colors.

Improvisation Focus Eb Melodic Minor and Altered Dominant scales to navigate the frequent $ii^{\varnothing} - V$ alterations.

Difficulty Rating 5/5. The dense harmonic rhythm, non-functional $ii-V$ sequences, and specific Monk-style chromaticism require advanced structural awareness and modal fluency.


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The Real Book - Volume I
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