Chord Distribution Analysis

Chord SymbolCountFrequency
Bm7511.6%
E7511.6%
Bbm749.3%
Gm737.0%
F#m724.7%
C724.7%
A7b924.7%
Amaj712.3%

Key Patterns Detected

PatternFunctionFrequency
Bm7 -> E7Setup (Major Key)5
Gm7 -> C7Setup (Major Key)2
E7 -> Amaj7Resolution (Major)1
C7 -> Fmaj7Resolution (Major)1
A7b9 -> Dm7Resolution (Minor)1
Dm7 -> G7Setup (Major Key)1
G7 -> Cm7Resolution (Minor)1
Cm7 -> F7Setup (Major Key)1
Am7b5 -> D7b9Setup (Minor Key)1
D7b9 -> Gm7Resolution (Minor)1
Em7b5 -> A7b9Setup (Minor Key)1
Fm7 -> Bb7Setup (Major Key)1
Cm7b5 -> F7b13Setup (Minor Key)1
F7b13 -> Bbm7b5Resolution (Minor)1
Bbm7b5 -> Eb7#9Setup (Minor Key)1
Eb7#9 -> Abmaj7Resolution (Major)1

Harmonic Highlights

  • Employs “side-slipping” parallel ii-V7 sequences moving by half-steps (Bbm7 to Bm7-E7), creating sophisticated harmonic tension and delaying tonal stability.
  • Features a descending chromatic chain of Major 7th and dominant chords (Amaj7-Ab7-Gmaj7-Gb7) that functions as an elongated turnaround.
  • Utilizes sequential ii-V cycles that modulate rapidly through transient key centers, such as the shift from F#m7-Gm7-C7 resolving to Fmaj7.
  • Reinforces the D minor tonic via a V7b9-im turnaround, providing a stable resolution after dense chromatic diversions.

Improvisation Focus Voice-leading through sequential ii-V progressions to navigate rapid, non-diatonic key shifts.

Difficulty Rating 4/5: The relentless modulation and non-functional sequences require advanced harmonic awareness and the ability to target chord tones across frequent key changes.


๐Ÿ“š Standard Available in:

The Real Book - Volume III
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