Chord Distribution Analysis

Chord SymbolCountFrequency
Gm71426.4%
C7917.0%
F6815.1%
Am7713.2%
D747.5%
Bbmaj735.7%
Fmaj723.8%
Bm711.9%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)5
D7 -> Gm7Resolution (Minor)4
Am7 -> D7Setup (Major Key)3
C7 -> Fmaj7Resolution (Major)2
Bm7 -> E7Setup (Major Key)1
E7 -> Am7Resolution (Minor)1
Cm7 -> F7Setup (Major Key)1
F7 -> Bbmaj7Resolution (Major)1
C7 -> Gm7Resolution (Minor)1

Harmonic Highlights

  • Stepwise Diatonic Motion: The A-section employs a I-ii-iii-ii (F6-Gm7-Am7-Gm7) oscillation, creating a melodic, horizontal feel rather than aggressive vertical tension.
  • Secondary Dominant V/ii: The D7 chord functions as a secondary dominant targeting Gm7, providing a strong chromatic pull that breaks the purely diatonic flow.
  • Dominant Prolongation: Multiple consecutive measures of C7 (V7) build significant harmonic pressure, requiring melodic development over a static dominant area before resolving to Fmaj7.
  • Tonicization of iii: The Bm7 chord acts as a “ii” relating to the iii chord (Am7), introducing a brief excursion into the mediant key area through standard ii-V logic.
  1. Improvisation Focus F Major Bebop Scale (integrating the b6 passing tone to navigate the I-ii-iii-ii movement with smooth voice leading).

  2. Difficulty Rating 2/5; the progression is predominantly diatonic and follows predictable circle-of-fifths movements, making it an excellent study for foundational jazz phrasing.


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The Real Vocal Book - Volume IV
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