Chord Distribution Analysis

Chord SymbolCountFrequency
Ebmaj7718.9%
Cm7513.5%
Bb738.1%
Dm7b525.4%
G7b925.4%
Bbm725.4%
Eb725.4%
Abmaj725.4%

Key Patterns Detected

PatternFunctionFrequency
Dm7b5 -> G7b9Setup (Minor Key)2
G7b9 -> Cm7Resolution (Minor)2
Bbm7 -> Eb7Setup (Major Key)2
Eb7 -> Abmaj7Resolution (Major)2
Abmaj7 -> Db7#11Setup (Major Key)2
Fm7 -> Bb7Setup (Major Key)2
Cm7 -> F7Setup (Major Key)1
Bb7 -> Ebmaj7Resolution (Major)1
Am7b5 -> D7Setup (Minor Key)1
Ebmaj7 -> Ab7Setup (Major Key)1
Gm7 -> C7Setup (Major Key)1
C7 -> Fm7Resolution (Minor)1

Harmonic Highlights

  • The progression features a minor ii-V-i (Dm7b5 – G7b9 – Cm7) to tonicize the relative minor, requiring a shift from Eb major to C harmonic minor.
  • A modulation to the subdominant (IV) occurs via a ii-V bridge (Bbm7 – Eb7) leading to Abmaj7.
  • A “backdoor” dominant sequence (Abmaj7 to Db7#11) provides a smooth chromatic resolution back to the tonic Ebmaj7.
  • The structure incorporates a secondary dominant (F7 as V/V) to build tension before the final ii-V-I turnaround.

Improvisation Focus Targeting guide tones (3rds and 7ths) to navigate the frequent ii-V-I cells and secondary dominant shifts.

Difficulty Rating 2/5: This standard is an ideal entry point for intermediate players because it uses predictable functional harmony and clear secondary dominant resolutions within a standard AB’ form.


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The Real Book - Volume I
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