Chord Distribution Analysis

Chord SymbolCountFrequency
Cm7414.3%
F7414.3%
A7414.3%
Bbmaj727.1%
F#m727.1%
Bm727.1%
Em727.1%
Dmaj727.1%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)4
F7 -> Bbmaj7Resolution (Major)2
Em7 -> A7Setup (Major Key)2
A7 -> Dmaj7Resolution (Major)2
Ebm7 -> Ab7Setup (Major Key)1
Dm7 -> G7Setup (Major Key)1
Dbm7 -> Gb7Setup (Major Key)1

Harmonic Highlights

  • Frequent use of sequential ii-V-I progressions that shift rapidly between distantly related keys like Bb major and the home key of D major.
  • Execution of chromatic descending ii-V chains (Dm7-G7, Dbm7-Gb7, Cm7-F7) which create harmonic “slippage” and delay resolution to the tonic.
  • Utilization of the A7 dominant chord as a pivot to re-establish D major through a classic iii-vi-ii-V (F#m7-Bm7-Em7-A7) turnaround.

Improvisation Focus Navigating rapid-fire ii-V-I cells using melodic voice leading to bridge disparate tonal centers.

Difficulty Rating 4/5: The constant modulation and non-diatonic chromatic shifts require advanced harmonic visualization and quick mental transposition.


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The Real Book - Volume I
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