Chord Distribution Analysis

Chord SymbolCountFrequency
Bbmaj7811.3%
Cm7811.3%
Gm768.5%
F757.0%
Ebmaj757.0%
F634.2%
Fm734.2%
F7b922.8%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)5
F7 -> Bbmaj7Resolution (Major)4
Cm7 -> F7b9Setup (Major Key)2
Fm7 -> Bb7Setup (Major Key)2
Bb7 -> Ebmaj7Resolution (Major)2
Am7 -> D7Setup (Major Key)1
D7 -> Gm/maj7Resolution (Major)1
Gm/maj7 -> C7#11Setup (Major Key)1
C7#11 -> Gm7b5Resolution (Minor)1
Gm7b5 -> C7Setup (Minor Key)1
C7 -> Fmaj7Resolution (Major)1
Gm7 -> C7Setup (Major Key)1
Fm7 -> Bb7b9Setup (Major Key)1
Bb7b9 -> Ebmaj7Resolution (Major)1
Em7b5 -> A7Setup (Minor Key)1

Harmonic Highlights

  • The progression utilizes classic I-vi-ii-V cycles in Bb major, providing a stable diatonic foundation before introducing chromatic substitutions.
  • A pivotal shift to the relative minor occurs via an Am7-D7 (ii-V of vi) leading to a Gm/maj7, which establishes a distinctive “line cliché” (G-Gb-F-E) within the harmonic movement.
  • The bridge modulates to the dominant (F major) using a Gm7b5-C7 (ii-V of V), incorporating a Lydian Dominant sound via the C7#11.
  • Extended dominant tensions, such as F7b9 and C7#11, are used to heighten melodic resolutions back to the tonic Bb major.

Improvisation Focus The Melodic Minor scale, particularly over the Gm/maj7 (G melodic minor) and the C7#11 (G melodic minor starting on C/Lydian Dominant).

Difficulty Rating 3 (Intermediate): Navigating the transition from diatonic Bb major to the specific tensions of the Gm/maj7 line cliché requires precise voice-leading and modal awareness.


📚 Standard Available in:

The Real Book - Volume III
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