Chord Distribution Analysis

Chord SymbolCountFrequency
Dm7820.5%
Gm7615.4%
C7615.4%
F637.7%
Am737.7%
A7b925.1%
Bbm725.1%
Eb725.1%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)6
A7b9 -> Dm7Resolution (Minor)2
Bbm7 -> Eb7Setup (Major Key)2
Dm7 -> G7Setup (Major Key)2
G7 -> Cmaj7Resolution (Major)1
Bm7b5 -> E7b9Setup (Minor Key)1
E7b9 -> Am7Resolution (Minor)1

Harmonic Highlights

  • Employs functional I-vi-ii-V turnarounds in F Major interspersed with secondary dominant (A7b9) tonicization of the submediant (Dm7).
  • Features a prominent subdominant minor “back-door” progression (iv7–bVII7) using Bbm7–Eb7 to resolve to the diatonic iii chord (Am7).
  • The bridge modulates to the dominant (C Major) via a standard ii-V-I (Dm7–G7–Cmaj7) before shifting to a minor ii-V-i in A minor.
  • Frequent use of diminished seventh passing chords (Co7) provides chromatic movement between tonic and subdominant harmonic areas.

Improvisation Focus Chord tone soloing to highlight the voice-leading shifts between the F major diatonicism and the Bbm7–Eb7 “back-door” substitution.

Difficulty Rating 2/5: The progression follows a predictable 32-bar structure with smooth, logical voice leading that accommodates both scalar and arpeggio-based approaches.