Chord Distribution Analysis

Chord SymbolCountFrequency
Cm71016.1%
Dm758.1%
Bbmaj746.5%
G7b934.8%
F734.8%
Gm734.8%
A734.8%
Ebmaj734.8%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)3
F7 -> Bbmaj7Resolution (Major)3
Dm7 -> G7b9Setup (Major Key)2
G7b9 -> Cm7Resolution (Minor)2
Bbmaj7 -> Eb7#11Setup (Major Key)2
Em7 -> A7Setup (Major Key)2
A7 -> Dmaj7Resolution (Major)2
Db7 -> Gbmaj7Resolution (Major)2
Abm7 -> Db7Setup (Major Key)1
Bb7 -> Ebmaj7Resolution (Major)1
Am7b5 -> D7b9Setup (Minor Key)1
Am7 -> D7Setup (Major Key)1
D7 -> Gm7Resolution (Minor)1
Dm7b5 -> G7b9Setup (Minor Key)1

Harmonic Highlights

  • Employs secondary dominants (G7b9) to initiate ii-V-I progressions in the relative major key of Bb.
  • Features rapid modulatory excursions to distant centers (D major and Gb major) via sudden ii-V-I sequences.
  • Utilizes chromatic voice leading through diminished passing chords (B°7) and Lydian dominant substitutions (Eb7#11) to smooth transitions between tonal centers.

Improvisation Focus Guide-tone targeting to navigate rapid modulations between distantly related key centers.

Difficulty Rating 4/5. The harmonic structure demands advanced proficiency to fluidly connect sequences across non-diatonic keys like Bb, D, and Gb major.