Chord Distribution Analysis

Chord SymbolCountFrequency
Am7821.1%
D7718.4%
Dm7615.8%
G7410.5%
A737.9%
Cmaj725.3%
E725.3%
G912.6%

Key Patterns Detected

PatternFunctionFrequency
Am7 -> D7Setup (Major Key)6
D7 -> Am7Resolution (Minor)4
Dm7 -> G7Setup (Major Key)4
G7 -> Dm7Resolution (Minor)2
G7 -> Cmaj7Resolution (Major)2
Cmaj7 -> F7Setup (Major Key)1
Em7 -> A7Setup (Major Key)1
A7 -> Dm7Resolution (Minor)1
Bm7b5 -> E7Setup (Minor Key)1
E7 -> Am7Resolution (Minor)1
Bm7 -> E7Setup (Major Key)1

Harmonic Highlights

  • Dorian Modal Vamp: The persistent i-IV movement (Am7 to D7) establishes a classic A Dorian foundation rather than a functional minor cadence.
  • Relative Major Transition: Movement through Dm7-G7 to Cmaj7 utilizes a ii-V-I in the relative major, providing tonal contrast to the A minor tonic.
  • Static Harmonic Rhythm: Extended sections of two-chord vamps emphasize atmospheric texture over complex functional turnaround patterns.
  • Subdominant Expansion: The Dm7-G7 sequences explore the subdominant area of A minor, creating a sense of “drifting” consistent with the lyrical theme.

Improvisation Focus A Dorian Mode.

Difficulty Rating 2/5; the slow tempo and repetitive modal structures are accessible, though players must navigate the subtle shifts to the relative major.


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The Real Book - Volume III
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