Chord Distribution Analysis

Chord SymbolCountFrequency
Cm7614.0%
Bm7614.0%
Eb7511.6%
Dm7b549.3%
Bbm749.3%
Dbm737.0%
Ebm724.7%
Ab724.7%

Key Patterns Detected

PatternFunctionFrequency
Bbm7 -> Eb7Setup (Major Key)4
Ebm7 -> Ab7Setup (Major Key)2
Ab7 -> Dbmaj7Resolution (Major)2
Fm7 -> Bb7Setup (Major Key)1
Bb7 -> Ebmaj7Resolution (Major)1

Harmonic Highlights

  • Extensive chromatic parallel motion featuring descending minor 7th chords (Dm7b5-Dbm7-Cm7-Bm7-Bbm7) that utilizes non-functional voice leading to delay resolution to the tonic.
  • Frequent ii-V cycles (Bbm7-Eb7 and Ebm7-Ab7) facilitate movement between the tonic Ab major and the subdominant Db major.
  • Strategic use of the #IV diminished chord (Dยฐ7) as a passing chord to bridge the subdominant Dbmaj7 back to the ii-V (Ebm7-Ab7) sequence.

Improvisation Focus

Side-slipping: Navigating the rapid, non-diatonic parallel movements by transposing melodic motifs or pentatonic cells down by half-steps.

Difficulty Rating

4 (Advanced): The relentless chromaticism and high-speed harmonic shifts require exceptional technical facility and instant mental transposition.


๐Ÿ“š Standard Available in:

The Real Book - Volume I
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