Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7714.0%
C7510.0%
Bbm748.0%
Eb748.0%
Fmaj748.0%
Am736.0%
D724.0%
Bm7b524.0%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)5
Bbm7 -> Eb7Setup (Major Key)4
Am7 -> D7Setup (Major Key)2
Abm7 -> Db7Setup (Major Key)2
Dm7 -> G7Setup (Major Key)2
F#m7 -> B7Setup (Major Key)1
B7 -> Em7Resolution (Minor)1
Em7 -> A7Setup (Major Key)1
A7 -> Dmaj7Resolution (Major)1
G7 -> Cmaj7Resolution (Major)1
C7 -> Gm7Resolution (Minor)1
C7 -> Fmaj7Resolution (Major)1

Harmonic Highlights

  • Frequent “back-door” ii-V sequences (Bbm7-Eb7) resolving to Fmaj7, providing the characteristic melancholy of the subdominant minor.
  • Chromatic side-slipping via the Abm7-Db7 to Gm7 sequence, utilizing tritone substitution logic to create smooth, descending voice leading toward the ii chord.
  • A sophisticated bridge modulation to D Major (the VI major), shifting the tonal center via Em7-A7-Dmaj7 before returning to F major.
  • The use of #iv half-diminished (Bm7b5) moving to iv minor (Bbm7), facilitating a chromatic descent in the bass and inner voices.

Improvisation Focus Navigating “back-door” dominant resolutions and mastering the parallel minor substitutions.

Difficulty Rating 3 (Intermediate): While the ballad tempo is forgiving, the frequent modulations and non-diatonic ii-V chains require a solid understanding of functional harmony and voice leading.


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The Real Book - Volume I
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