Chord Distribution Analysis

Chord SymbolCountFrequency
G71644.4%
E25.6%
Bm725.6%
Ebmaj712.8%
Bb7sus12.8%
A1312.8%
Dmaj712.8%
Ab13b912.8%

Key Patterns Detected

PatternFunctionFrequency
Ebmaj7 -> Bb7susSetup (Major Key)1
F#7b13 -> Bm7Resolution (Minor)1
Gm7 -> C7Setup (Major Key)1
C7 -> Fmaj7Resolution (Major)1

Harmonic Highlights

  • The A section features an extended G7 pedal point, establishing a modal Mixolydian/Blues foundation rather than functional V-I movement.
  • The bridge utilizes rapid-fire chromatic modulation and non-functional shifts, notably moving from E to Ebmaj7 and using Bb7sus to tonicize D major.
  • Tritone substitutions are prominent, specifically the Ab13b9 resolving to Gmaj7, which bridges disparate tonal centers.
  • High-extension tertian harmony, such as Cmaj7#11 and F#7b13, creates a sophisticated post-bop texture during the transition back to the G pedal.

Improvisation Focus G Mixolydian and G Pentatonic shifting for the A section, contrasted with rapid melodic cell navigation over the bridge’s shifting centers.

Difficulty Rating 4 (Advanced): The extreme contrast between the static modal vamp and the highly technical, fast-moving bridge requires mastery of both blues-based phrasing and precise functional navigation.


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The Real Book - Volume III
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