Chord Distribution Analysis

Chord SymbolCountFrequency
Bbm71838.3%
Ebm1634.0%
Bmaj724.3%
Abm624.3%
Ebm724.3%
Abm724.3%
Db724.3%
Gbmaj712.1%

Key Patterns Detected

PatternFunctionFrequency
Abm7 -> Db7Setup (Major Key)2
Db7 -> Gbmaj7Resolution (Major)1
Fm7b5 -> Bb7b9Setup (Minor Key)1
Bb7b9 -> EbmResolution (Minor)1

Harmonic Highlights

  • The A section utilizes a static i-v (Ebm to Bbm7) modal vamp, relying on the minor dominant to maintain a “cool” Dorian atmosphere rather than functional V7-i tension.
  • The B section modulates toward the relative major (Gb) territory, shifting from Bmaj7 (VI) to Abm6 (iv6) to create a sophisticated subdominant bridge back to the tonic.
  • Harmonic rhythm is dictated by the 5/4 meter, typically splitting measures into a 3+2 pattern that emphasizes the minor i chord on the downbeat and the v chord on the upbeat of the fourth beat.
  1. Improvisation Focus Eb Minor Blues Scale and the Eb Dorian mode.

  2. Difficulty Rating 3 (Intermediate): The harmonic changes are straightforward, but improvising fluidly within the 5/4 time signature requires advanced rhythmic displacement and phrasing skills.


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The Real Book - Volume I
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