Chord Distribution Analysis

Chord SymbolCountFrequency
Gmaj7630.0%
C7630.0%
Bmaj7210.0%
Fm7b515.0%
Bb715.0%
Ebm715.0%
Ebm7/Db15.0%
Cm7b515.0%

Key Patterns Detected

PatternFunctionFrequency
Gmaj7 -> C7Setup (Major Key)6
C7 -> Gmaj7Resolution (Major)4
Fm7b5 -> Bb7Setup (Minor Key)1
Bb7 -> Ebm7Resolution (Minor)1
Cm7b5 -> F7Setup (Minor Key)1

Harmonic Highlights

  • The recurring Gmaj7 to C7 vamp establishes a Lydian/Lydian-Dominant tonality, common in Harris’s Brazilian-influenced compositions.
  • A sudden chromatic mediant shift to Bmaj7 disrupts the G major center, bridging the gap to a darker minor tonality.
  • The sequence Fm7b5–Bb7–Ebm7 functions as a clear ii-V-i in Eb minor, providing a functional anchor amidst distant modulations.
  • Stepwise bass descent (Ebm7/Db to Cm7b5) creates smooth voice leading to the F7 secondary dominant, facilitating the return to Gmaj7.

Improvisation Focus Navigating sudden tonal shifts between G major and Eb minor using Barry Harris’s “half-step rule” for bebop scales.

Difficulty Rating 3/5. The rhythmic groove is accessible, but the frequent leaps between distantly related key centers require advanced harmonic navigation skills.