Chord Distribution Analysis

Chord SymbolCountFrequency
Fm7922.0%
F7512.2%
Cm749.8%
Bb737.3%
Bb7#524.9%
Ebmaj724.9%
Gm724.9%
C7b924.9%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)4
Fm7 -> Bb7#5Setup (Major Key)2
Bb7#5 -> Ebmaj7Resolution (Major)2
Gm7 -> C7b9Setup (Major Key)2
C7b9 -> Fm7Resolution (Minor)2
Fm7 -> Bb7Setup (Major Key)2
Bbm7 -> Eb7Setup (Major Key)2
Eb7 -> Bbm7Resolution (Minor)1
F7 -> Cm7Resolution (Minor)1
Fm7 -> C7#5#9Setup (Major Key)1
Bb7 -> Fm7Resolution (Minor)1

Harmonic Highlights

  • Frequent ii-V-I cycles that oscillate between F minor, Eb major, and Ab major, requiring a strong grasp of functional relationships.
  • Utilization of the bII7 (Db7#11) as a tritone substitute or subdominant minor substitute to provide smooth chromatic voice leading toward the tonic.
  • Sophisticated secondary dominant chains, such as Cm7-F7 moving to Bbm7, which expand the harmonic rhythm beyond simple diatonic patterns.
  • Integration of altered dominant tensions (Bb7#5, C7b9) that demand specific melodic resolutions to accommodate the #5 and b9 extensions.

Improvisation Focus Guide-tone targeting (3rds and 7ths) to maintain melodic fluidity through the rapid succession of ii-V-I modulations.

Difficulty Rating 3/5 because while the ballad tempo offers more time to react, the constant shifts between closely related key centers require advanced harmonic visualization.


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The Real Book - Volume V
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