Chord Distribution Analysis

Chord SymbolCountFrequency
F7720.0%
G7617.1%
Cm7514.3%
Bbmaj725.7%
Dm725.7%
Fm725.7%
Bb725.7%
Eb725.7%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)5
G7 -> Cm7Resolution (Minor)4
Dm7 -> G7Setup (Major Key)2
Fm7 -> Bb7Setup (Major Key)2
F7 -> Bbmaj7Resolution (Major)1

Harmonic Highlights

  • The progression utilizes dense chains of ii-V sequences (Dm7-G7, Cm7-F7, Fm7-Bb7) that shift the tonal center rapidly by descending fourths.
  • A prominent dominant cycle (D7–G7–C7–F7) serves as a bridge-like structure, creating high tension before resolving back to the tonic area.
  • The movement from Bbmaj7 to G7 functions as a I–VI transition, typical of “Rhythm Changes,” though modified here with chromatic substitutions.

Improvisation Focus Bebop scales (Dominant and Major) combined with arpeggio-based “digital patterns” (1-2-3-5) to navigate the fast-moving harmonic rhythm.

Difficulty Rating 4/5: The high-tempo harmonic density and constant cycling through secondary dominants require advanced structural awareness and precise technical facility.


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The Real Book - Volume III
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