Chord Distribution Analysis

Chord SymbolCountFrequency
B749.8%
Dm749.8%
Am737.3%
D737.3%
Cmaj724.9%
Em7b524.9%
A7b924.9%
Dm7/C24.9%

Key Patterns Detected

PatternFunctionFrequency
B7 -> Em7b5Resolution (Minor)2
Em7b5 -> A7b9Setup (Minor Key)2
A7b9 -> Dm7Resolution (Minor)2
F#m7 -> B7Setup (Major Key)2
Am7 -> D7Setup (Major Key)1
Dm7 -> G7susSetup (Major Key)1
G7 -> Cmaj7Resolution (Major)1
Dm7 -> G7Setup (Major Key)1

Harmonic Highlights

  • The sequence Em7b5–A7b9–Dm7 establishes a secondary tonal center in the subdominant minor (iv) using a standard minor ii-V-i progression.
  • A chromatic descending line from Dm7/C to Bb7 functions as a tritone substitute (subV), facilitating a smooth, non-diatonic resolution back to the A minor tonic.
  • The transition to Emaj7 signals a sudden modulation to the parallel major of the dominant, introducing a bright contrast to the previous minor-key density.
  • Diminished passing chords (Fº7, Gº7) provide symmetrical tension and chromatic voice leading between diatonic scale degrees in the B-section.

Improvisation Focus A Minor Melodic Minor and its modes (specifically Altered and Locrian â™®2) to navigate the frequent secondary dominants and minor-key cadences.

Difficulty Rating 4/5. The combination of chromatic bass movements and the sudden leap into E major demands high-level modal switching and precise harmonic awareness.