Chord Distribution Analysis

Chord SymbolCountFrequency
Fmaj7917.6%
Dm747.8%
Bb735.9%
Am735.9%
Eb735.9%
D735.9%
G735.9%
C7sus35.9%

Key Patterns Detected

PatternFunctionFrequency
Em7b5 -> A7b9Setup (Minor Key)2
Am7 -> D7Setup (Major Key)1
Fmaj7 -> C7susSetup (Major Key)1
C7sus -> Fmaj7Resolution (Major)1
Dm7 -> G7Setup (Major Key)1
A7b9 -> Dm7Resolution (Minor)1
C7 -> Fmaj7Resolution (Major)1
Fmaj7 -> Bb7Setup (Major Key)1

Harmonic Highlights

  • The opening sequence utilizes a chromatic descending bass line (Dm7–Dm7/C–Bm7b5–Bb7), creating a signature Ellingtonian “dark” ballad foundation via a line clichĂ©.
  • Tritone substitutions such as Eb7 function as a subV/V, providing sophisticated harmonic tension before resolving into the G7 and C7 dominant cycles.
  • The modulation from D minor to the relative F major is achieved through ii-V-I cadences and tonic pedal points (Gm7b5/F), utilizing modal interchange to brighten the tonal palette.

Improvisation Focus D Melodic Minor for the initial descent, prioritizing guide-tone voice leading through the shifting chromatic inner voices.

Difficulty Rating 3 (Intermediate): The performer must navigate the transition between parallel/relative keys while managing the tension of non-diatonic substitutions and chromatic bass movement.