Chord Distribution Analysis

Chord SymbolCountFrequency
Fmaj7815.7%
F659.8%
Gm759.8%
D7b959.8%
C747.8%
C7#535.9%
D735.9%
Ab0723.9%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)4
C7#5 -> Fmaj7Resolution (Major)3
Am7 -> D7Setup (Major Key)2
D7 -> Gm7b5Resolution (Minor)2
Bbmaj7 -> Eb7Setup (Major Key)1
Bm7b5 -> E7b9Setup (Minor Key)1
E7b9 -> Am7b5Resolution (Minor)1
Am7b5 -> D7b9Setup (Minor Key)1
D7b9 -> Gm7Resolution (Minor)1
Gm7 -> C7b9Setup (Major Key)1
C7b9 -> Fmaj7Resolution (Major)1
  • The Ab07 functions as a chromatic diminished chord, creating tension by leading semi-tonally to the Gm7 (ii).
  • The progression F7 -> D7b9 -> Bbm6 introduces a secondary dominant (F7 as V of Bb) followed by a V7b9 of Gm (D7b9) resolving deceptively to the parallel minor subdominant (Bbm6).
  • Frequent use of altered dominants, such as C7#5 and C7b9#5, creates strong leading-tone tension for resolution.
  • A Gm7b5 -> C7b9#5 functions as a iiø7-V7alt progression resolving to Bbmaj7 (IVmaj7), indicating a common turnaround or section change.

Improvisation Focus: Altered dominant scales.

Difficulty Rating: 3 (Intermediate). Requires navigating altered dominant voicings and chromatic resolutions beyond basic diatonic harmony.