Chord Distribution Analysis

Chord SymbolCountFrequency
Bbmaj7717.5%
Bmaj7/Bb410.0%
Ebmaj7/Bb37.5%
Am737.5%
G9sus37.5%
Bb0725.0%
Abmaj725.0%
Abmaj7#11/G25.0%

No obvious ii-V patterns detected.


Harmonic Highlights

  • Static Bb pedal point creates a drone effect, anchoring shifting upper-structure triads and chromatic neighboring chords.
  • Chromatic “side-slipping” between Bbmaj7 and Bmaj7/Bb introduces sharp non-diatonic tension (bII/I) that bypasses traditional functional resolution.
  • Modal interchange and Lydian colors are emphasized through C/Bb and Ebmaj7/Bb, providing bright, open-ended harmonic extensions.
  • Symmetrical Bb diminished (Bb°7) chords function as neighbor-tone embellishments to the tonic Bbmaj7 rather than as functional leading-tone dominants.

Improvisation Focus The Bb Lydian scale (Bb, C, D, E, F, G, A) to manage the persistent #11 tension and Lydian-major brightness over the pedal.

Difficulty Rating 4 (Advanced) because the lack of standard functional cadences requires the soloist to maintain melodic momentum and structural logic over static, non-functional shifts.