Chord Distribution Analysis

Chord SymbolCountFrequency
Fm71021.3%
Bb7612.8%
Ebmaj748.5%
Eb636.4%
F736.4%
Abmaj724.3%
Gm7b524.3%
C7b1324.3%

Key Patterns Detected

PatternFunctionFrequency
Fm7 -> Bb7Setup (Major Key)5
Bb7 -> Ebmaj7Resolution (Major)2
Gm7b5 -> C7b13Setup (Minor Key)2
C7b13 -> Fm7Resolution (Minor)2
Abm7 -> Db7Setup (Major Key)2
Cm7 -> F7Setup (Major Key)1
Am7 -> D7Setup (Major Key)1
C7 -> Fm7Resolution (Minor)1

Harmonic Highlights

  • Frequent use of the “back-door” ii-V sequence ($Abm7$ - $Db7$) resolving to $Ebmaj7$ provides a sophisticated subdominant minor flavor.
  • Tonicization of the ii chord ($Fm7$) via its own ii-V ($Gm7b5$ - $C7b13$) shifts the tonal center to the relative minor area.
  • Chromatic voice leading through the $Gb^{\circ}7$ passing chord facilitates a smooth scalar ascent from the tonic $Eb$ to the supertonic $Fm7$.
  • Secondary dominants ($F7$ to $Bb7$) utilize the cycle of fifths to reinforce the primary $Eb$ major tonality.

Improvisation Focus Mastery of Major and Minor ii-V-I cells, specifically navigating the transition from $Eb$ Major to the $F$ Aeolian/Minor landscape.

Difficulty Rating 3/5 - The tune requires precise navigation of minor ii-Vs and non-diatonic substitutions while maintaining a lyrical, slow-ballad phrasing.


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The Real Book - Volume I
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