Chord Distribution Analysis

Chord SymbolCountFrequency
Bbmaj7716.7%
B7511.9%
Dm7511.9%
Cm749.5%
Cm7b537.1%
Ebm737.1%
Ab737.1%
Dbm724.8%

Key Patterns Detected

PatternFunctionFrequency
Ebm7 -> Ab7Setup (Major Key)3
Am7b5 -> D7b9Setup (Minor Key)1
D7b9 -> Gm7Resolution (Minor)1
Gm7 -> C7Setup (Major Key)1
Cm7b5 -> F7b5Setup (Minor Key)1
F7b5 -> Bbmaj7Resolution (Major)1
Dm7 -> G7Setup (Major Key)1
G7 -> Cm7Resolution (Minor)1
Cm7 -> F7Setup (Major Key)1

Harmonic Highlights

  • Frequent chromatic “side-slipping” between Bbmaj7 and B7, where B7 functions as a tritone substitute for the primary dominant (F7).
  • Use of a “backdoor” ii-V progression (Ebm7 - Ab7) that resolves deceptively to the mediant Dm7 instead of the tonic.
  • A descending chromatic sequence (Dm7 - Dbm7 - Cm7 - B7) that utilizes parallel motion to create a sophisticated turnaround back to Bb.

Improvisation Focus Bebop scales and chromatic enclosures to navigate rapid, half-step harmonic shifts.

Difficulty Rating 4/5: The high-speed harmonic rhythm and constant non-diatonic substitutions require advanced linear fluency and precise voice leading.


📚 Standard Available in:

The Real Book - Volume III
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