Chord Distribution Analysis

Chord SymbolCountFrequency
C71125.6%
Gm7614.0%
Ab0749.3%
G749.3%
F637.0%
F737.0%
Fmaj724.7%
Am724.7%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)5
C7 -> Gm7Resolution (Minor)1
F7 -> Cm7Resolution (Minor)1
Cm7 -> F7Setup (Major Key)1
G7 -> Dm7Resolution (Minor)1
Dm7 -> G7Setup (Major Key)1
C7 -> Fmaj7Resolution (Major)1

Harmonic Highlights

  • The use of Ab°7 (bIII°7) functions as a chromatic passing chord between the Imaj7 and iim7, a hallmark of 1930s swing harmony that smooths the voice leading.
  • The bridge employs a classic modulation to the subdominant (Bb6) initiated by a secondary ii-V (Cm7 - F7), providing a brief tonal shift typical of AABA structures.
  • Rapid chromatic dominant cycles (Bb7 - A7 - Ab7) create descending parallel motion, providing strong leading-tone tension that resolves toward the tonic turnaround.

Improvisation Focus F Major Bebop Scale (integrating chromatic passing tones to align with the diminished harmony).

Difficulty Rating 2/5: The progression relies on standard diatonic cycles and predictable chromatic connectors, making it very accessible for intermediate players.