Chord Distribution Analysis

Chord SymbolCountFrequency
Cm71248.0%
Eb7624.0%
Abm728.0%
Gbmaj714.0%
F714.0%
Emaj714.0%
A/Ab14.0%
G7b9b1314.0%

Key Patterns Detected

PatternFunctionFrequency
Eb7 -> Abm7Resolution (Minor)1

Harmonic Highlights

  • Modal Tonicization: The opening eight bars of Cm7 establish a C Dorian environment, functioning as the vi chord relative to the Eb major key center.
  • Expanded Blues Form: The 24-bar structure stretches the traditional minor blues framework, using Eb7 to create dominant tension before the final sequence.
  • Chromatic Planing: The concluding turnaround (Gbmaj7โ€“F7โ€“Emaj7โ€“Eb7) uses parallel chord movement, shifting away from functional harmony through constant-structure chromatic descents.

Improvisation Focus C Dorian scale, emphasizing the “blue” notes and melodic tracking of the final chromatic descent.

Difficulty Rating 3/5: The harmonic rhythm is slow and accessible, but the non-standard 24-bar form and chromatic ending require intermediate-level structural awareness.


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The Real Book - Volume I
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