Chord Distribution Analysis

Chord SymbolCountFrequency
Bb7sus1321.0%
Bmaj7#111219.4%
F7sus1219.4%
Cm71117.7%
Eb7sus46.5%
A7sus34.8%
Db7sus34.8%
F#7sus23.2%

No obvious ii-V patterns detected.


Harmonic Highlights:

  • Chromatic side-slipping between C Dorian (ii) and Bmaj7#11 (bII), creating a modern neighbor-chord relationship that subverts traditional ii-V-I expectations.
  • A rapid sequence of non-functional dominant 7sus4 chords (Bb7sus, A7sus, F#7sus, etc.) utilizing “constant structures” to create shifting modal planes.
  • Harmonic instability driven by root movements in major and minor thirds, moving away from Bb major towards more distant tonal centers.

Improvisation Focus: Modal interchange between C Dorian and B Lydian.

Difficulty Rating: 4/5. The combination of a high-velocity tempo and non-functional chromatic “sus” chord chains requires advanced modal fluency and rapid mental transposition.