Chord Distribution Analysis

Chord SymbolCountFrequency
Dbmaj7516.7%
Eb7516.7%
Gbmaj726.7%
G0726.7%
Db6/Ab26.7%
Bb726.7%
A726.7%
Ebm726.7%

Key Patterns Detected

PatternFunctionFrequency
Ebm7 -> Ab7Setup (Major Key)2
Cm7b5 -> F7b9Setup (Minor Key)1
F7b9 -> BbmResolution (Minor)1
Bbm7 -> Eb7Setup (Major Key)1
Ab7 -> Dbmaj7Resolution (Major)1
Bb7 -> Ebm7Resolution (Minor)1

Harmonic Highlights

  • The progression utilizes a secondary dominant chain (Eb7 to Bb7 to A7), incorporating chromatic approach chords that challenge standard diatonic expectations.
  • A prominent #IV diminished movement (Gbmaj7 to G°7) functions as a passing chord to the tonic’s second inversion (Db6/Ab), echoing gospel and blues harmonic devices.
  • The use of a minor line clichĂ© (Bbm to Bbm/maj7 to Bbm7) creates descending internal chromatic movement within the tonic minor harmony.
  • A standard minor ii-V-i (Cm7b5 - F7b9 - Bbm) firmly establishes the Bb minor tonality amidst the surrounding Db major relative movements.

Improvisation Focus

Bb Melodic Minor and its modes to navigate the chromatic line cliché and the minor ii-V-i cadence.

Difficulty Rating

3 (Intermediate): The performer must navigate non-diatonic secondary dominants and maintain precise voice-leading over the fast-moving minor line cliché.