Chord Distribution Analysis

Chord SymbolCountFrequency
Fm7614.6%
Abmaj749.8%
Bb749.8%
Am7b537.3%
Ebmaj724.9%
Eb724.9%
Ab0724.9%
Ebmaj7/G24.9%

Key Patterns Detected

PatternFunctionFrequency
Fm7 -> Bb7Setup (Major Key)4
Eb7 -> Abmaj7Resolution (Major)2
Ab07 -> Ebmaj7/GResolution (Major)2
Am7b5 -> D7b9Setup (Minor Key)1
C7 -> Fm7Resolution (Minor)1
Bb7 -> Ebmaj7Resolution (Major)1

Harmonic Highlights

  • Frequent use of diminished passing chords (Ab°7, Gb°7, E°7) creates smooth chromatic bass motion connecting the I, IV, and ii chords.
  • The subdominant minor (Abm6) provides a classic “sentimental” resolution to the tonic (Eb6/G), a hallmark of Gershwin’s harmonic language.
  • A secondary ii-V sequence (Am7b5 to D7b9) creates a temporary pull toward the mediant (Gm7), adding sophisticated tonal variety beyond simple diatonicism.

Improvisation Focus Eb Major Bebop scale, emphasizing chord tones and chromatic voice-leading to bridge the frequent diminished passing chords.

Difficulty Rating 2/5: The slow ballad tempo provides ample time to navigate the dense harmonic rhythm and chromatic transitions.


📚 Standard Available in:

The Real Book - Volume V
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