Chord Distribution Analysis

Chord SymbolCountFrequency
Fmaj7820.0%
C7615.0%
Gm7512.5%
Dm7410.0%
D7b1337.5%
Abmaj737.5%
A7b925.0%
Bmaj712.5%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)5
C7 -> Fmaj7Resolution (Major)5
D7b13 -> Gm7Resolution (Minor)3
A7b9 -> Dm7Resolution (Minor)2
Bbm7 -> Eb7Setup (Major Key)1
Eb7 -> Abmaj7Resolution (Major)1
Am7 -> D7Setup (Major Key)1

Harmonic Highlights

  • Employs the “Idaho” contrafact structure, utilizing a III7 (A7b9) to vi (Dm7) secondary dominant motion to reinforce the F major tonality.
  • Features a series of parallel major 7th chords (Bmaj7, Amaj7, Abmaj7, Gbmaj7) that creates a chromatic “side-slipping” effect, momentarily suspending functional harmony.
  • Integrates dominant alterations like the D7b13 to increase harmonic tension before resolving into standard ii-V-I turnarounds.

Improvisation Focus Linear chromaticism and voice leading over non-functional parallel major structures.

Difficulty Rating 4/5 – The rapid, non-diatonic shifts and the break from traditional functional harmony require advanced ear training and high-level melodic precision.