Chord Distribution Analysis

Chord SymbolCountFrequency
Dm625.0%
Em7b5520.8%
A7b9520.8%
D7#914.2%
Gm14.2%
Gm7/F14.2%
Dbm14.2%
Cm714.2%

Key Patterns Detected

PatternFunctionFrequency
Em7b5 -> A7b9Setup (Minor Key)5
A7b9 -> DmResolution (Minor)5
D7#9 -> GmResolution (Minor)1
Cm7 -> F7Setup (Major Key)1
Dm -> A7#9Setup (Major Key)1

Harmonic Highlights

  • The structure is anchored by repeated minor ii-V-i progressions (Em7b5–A7b9–Dm), emphasizing a traditional Afro-Cuban minor tonality with altered dominant resolutions.
  • A secondary dominant (D7#9) provides a high-tension transition to Gm, functioning as a V/iv typical of minor blues variations.
  • Chromatic side-slipping (Dm–Dbm–Cm7) serves as a sophisticated bridge to the F7 and Bb7 chords, introducing temporary tonal ambiguity through parallel motion.

Improvisation Focus D Harmonic Minor (specifically the A Phrygian Dominant mode over the A7b9 chords).

Difficulty Rating 3/5; the progression follows clear functional logic, but navigating the altered dominant extensions and chromatic transitions requires intermediate-level harmonic fluency.