Chord Distribution Analysis

Chord SymbolCountFrequency
Ebmaj7545.5%
Db7436.4%
Am719.1%
D719.1%

Key Patterns Detected

PatternFunctionFrequency
Am7 -> D7Setup (Major Key)1

Harmonic Highlights

  • The progression features a persistent oscillation between Ebmaj7 and Db7, utilizing the bVII7 as a modal neighbor (Backdoor dominant) rather than a functional resolve.
  • The sudden insertion of Am7 - D7 creates a remote ii-V relationship, providing a brief chromatic departure from the Eb tonal center.
  • Tyner’s harmonic architecture implies quartal voicings throughout, allowing for modern, open-sounding textures over the traditional lead sheet changes.
  • The structure emphasizes a Lydian-Mixolydian palette, shifting the fourth (Ab to A natural) to accommodate the shifting dominant textures.

Improvisation Focus Modal shifting between Eb Lydian and Eb Mixolydian.

Difficulty Rating 3/5. The slow harmonic rhythm is deceptive, requiring the soloist to navigate non-functional dominant chords and sudden distant ii-V shifts with melodic continuity.


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The Real Book - Volume I
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