Chord Distribution Analysis

Chord SymbolCountFrequency
G7614.0%
Fmaj749.3%
D749.3%
Gm749.3%
C749.3%
Eb737.0%
Em7b537.0%
Dm37.0%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)4
C7 -> Fmaj7Resolution (Major)2
Em7b5 -> A7b9Setup (Minor Key)2
A7b9 -> DmResolution (Minor)2
Cm7 -> F7Setup (Major Key)1
F7 -> Bbmaj7Resolution (Major)1
Bbm7 -> Eb7Setup (Major Key)1
Em7b5 -> A7Setup (Minor Key)1
A7 -> DmResolution (Minor)1
Am7 -> D7Setup (Major Key)1
D7 -> Gm7Resolution (Minor)1

Harmonic Highlights

  • The bVII7 (Eb7) acts as a chromatic pivot or backdoor dominant leading into the VI7 (D7), facilitating a transition into a prolonged cycle of fifths.
  • Secondary dominants (D7 and G7) create strong directional tension, requiring the soloist to navigate temporary tonicizations of the ii and V chords.
  • A modulation to the subdominant (Bbmaj7) is followed by a minor iv (Bbm7) or backdoor bVII7 (Eb7), utilizing a minor plagal resolution to return to the tonic Fmaj7.

Improvisation Focus Voice-leading through secondary dominants (3rd-to-7th guide tone connections).

Difficulty Rating 2/5. The progression follows highly predictable swing-era conventions and cycle-of-fifths movement, making it an accessible study in functional harmony.