Chord Distribution Analysis

Chord SymbolCountFrequency
Bbmaj9614.0%
Gm949.3%
Fmaj949.3%
Cm949.3%
C737.0%
C7#524.7%
F7#524.7%
Bbm924.7%

Key Patterns Detected

PatternFunctionFrequency
Gm9 -> C7#5Setup (Major Key)2
C7#5 -> Fmaj9Resolution (Major)2
Cm9 -> F7#5Setup (Major Key)2
F7#5 -> Bbmaj9Resolution (Major)2
Am7b5 -> D7Setup (Minor Key)2
C7b9 -> Fmaj7Resolution (Major)1
F7 -> Bbm7Resolution (Minor)1
C7 -> Gm9Resolution (Minor)1
Bbm9 -> Eb7Setup (Major Key)1
Gm7 -> C7Setup (Major Key)1

Harmonic Highlights

  • Functional ii-V-I progressions in F major (Gm9-C7#5-Fmaj9) establish the primary tonal center before shifting to the subdominant.
  • A secondary ii-V (Cm9-F7#5) facilitates a temporary modulation to Bb major, typical of the AABA-adjacent structure.
  • Modal interchange via the minor subdominant (Bbm9, Bbm6) provides the characteristic “blue” sentiment, resolving back to F through a C7b9 dominant.
  • Chromatic dominant movement (Db7 to C7) utilizes a bII-V tritone substitution relationship to strengthen the resolution to the tonic.

Improvisation Focus Mastering the shift between F Major and the Bb Melodic Minor scale to navigate the subdominant minor resolutions.

Difficulty Rating 2/5. The slow ballad tempo and standard functional transitions make it accessible for intermediate players, though the minor-iv shifts require precise melodic targeting.


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The Real Book - Volume II
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