Chord Distribution Analysis

Chord SymbolCountFrequency
Bbm71020.0%
Gm7b5816.0%
F7b9612.0%
Bbm7/Ab48.0%
Bbm7/F48.0%
Cm7b548.0%
Ab748.0%
Gb748.0%

Key Patterns Detected

PatternFunctionFrequency
F7b9 -> Bbm7Resolution (Minor)6
Cm7b5 -> F7b9Setup (Minor Key)2
Cm7b5 -> F7Setup (Minor Key)2
F7 -> Bbm7Resolution (Minor)2

Harmonic Highlights

  • The progression utilizes a minor line cliché (Bb-Ab-G-Gb), creating smooth chromatic voice-leading through the bass while maintaining the tonic Bb minor quality.
  • Standard minor ii-V-I cadences (Cm7b5 to F7b9) provide structural gravity and clear functional resolutions back to the tonic.
  • The E°7 chord functions as a passing diminished chord or rootless secondary dominant (C7b9), intensifying the pull toward the V7 (F7).
  • Incorporates a bVII7 to bVI7 (Ab7 to Gb7) movement, characteristic of soul-jazz and blues-based minor themes.

Improvisation Focus Bb Blues scale combined with Bb Melodic Minor.

Difficulty Rating 3 (Intermediate): While the bluesy feel is accessible, navigating the minor ii-V-I turnarounds and descending chromatic bass lines requires solid harmonic awareness.


📚 Standard Available in:

The Real Book - Volume II
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