Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7315.0%
Bm7b5210.0%
E7b9210.0%
Am7210.0%
D7210.0%
Fmaj7210.0%
F6210.0%
Am7b515.0%

Key Patterns Detected

PatternFunctionFrequency
Bm7b5 -> E7b9Setup (Minor Key)2
E7b9 -> Am7Resolution (Minor)2
Am7 -> D7Setup (Major Key)2
D7 -> Am7b5Resolution (Minor)1
Am7b5 -> D7b9Setup (Minor Key)1
D7b9 -> Gm7Resolution (Minor)1
Bbm7 -> Eb7Setup (Major Key)1
D7 -> Gm7Resolution (Minor)1
Gm7 -> C7Setup (Major Key)1

Harmonic Highlights

  • Extensive use of minor ii-V-i progressions (Bm7b5-E7b9-Am7) to tonicize the mediant, creating a sophisticated, non-diatonic harmonic landscape.
  • Implementation of a “backdoor” ii-V (Bbm7-Eb7) resolving to Fmaj7, providing a romantic modal interchange effect from the parallel minor.
  • Sequential movement through secondary dominants, specifically alternating between major (Am7-D7) and minor (Am7b5-D7b9) ii-V patterns to target the Gm7 chord.

Improvisation Focus

  • Harmonic Minor scales (specifically A and D) to accurately navigate the V7b9 tensions within the frequent minor-key turnarounds.

Difficulty Rating 3/5: The soloist must fluidly pivot between major and minor functional harmony while maintaining melodic continuity across multiple temporary tonal centers.