Chord Distribution Analysis

Chord SymbolCountFrequency
Abmaj7318.8%
F7318.8%
Bbm7318.8%
Eb7318.8%
Cm7212.5%
Dbmaj716.2%
Dbm616.2%

Key Patterns Detected

PatternFunctionFrequency
F7 -> Bbm7Resolution (Minor)3
Cm7 -> F7Setup (Major Key)2
Bbm7 -> Eb7Setup (Major Key)2
Eb7 -> Abmaj7Resolution (Major)2
Abmaj7 -> Eb7Setup (Major Key)1

Harmonic Highlights

  • Utilization of the subdominant minor (Dbm6) creates a poignant chromatic bridge between the IV chord and the iii-VI-ii-V turnaround.
  • Frequent use of secondary dominants, specifically F7 (V/ii), facilitates smooth transitions into the Bbm7-Eb7-Abmaj7 resolutions.
  • Strong diatonic foundation established by the Imaj7-IVmaj7 (Abmaj7-Dbmaj7) opening, grounding the ear before the more dense cyclical movements.
  • The progression relies heavily on the cycle of fifths (Cm7-F7-Bbm7-Eb7), requiring precise navigation of dominant-to-minor resolutions.

Improvisation Focus Linear bebop phrasing emphasizing chord tones and guide-tone lines within a 3/4 waltz metric.

Difficulty Rating 3/5: The harmonic structure is accessible, but improvising fluently in 3/4 time at a typical Rollins tempo presents a moderate rhythmic challenge.


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The Real Book - Volume I
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