Chord Distribution Analysis

Chord SymbolCountFrequency
Gm7612.8%
C7612.8%
Am7510.6%
Fmaj748.5%
D736.4%
Bbm736.4%
Eb736.4%
Bb724.3%

Key Patterns Detected

PatternFunctionFrequency
Gm7 -> C7Setup (Major Key)6
C7 -> Fmaj7Resolution (Major)3
Am7 -> D7Setup (Major Key)3
Fmaj7 -> Bb7Setup (Major Key)2
D7 -> Gm7Resolution (Minor)2
Bbm7 -> Eb7Setup (Major Key)2
Eb7 -> Abmaj7Resolution (Major)1
Dm7 -> G7Setup (Major Key)1
C7 -> Gm7Resolution (Minor)1

Harmonic Highlights

  • Features a modulation to the bIII (Ab Major) via a Bbm7-Eb7 ii-V sequence, shifting the tonal center up a minor third.
  • Employs Bb7 (IV7) to resolve chromatically to Am7 (iii), acting as a bridge between the tonic and the secondary dominant D7.
  • Incorporates a tonicization of the V key (C Major) via a G7 dominant, requiring a temporary shift in scale choice away from the home key.
  • Utilizes a recurring ii-V-I in F Major to ground the ear before and after modulations.
  1. Improvisation Focus Connecting disparate ii-V-I cells (F, Ab, and C Major) using guide-tone voice leading to maintain melodic continuity.

  2. Difficulty Rating 3 (Intermediate): Navigating sudden modulations to distant keys like Ab Major requires proficiency with ii-V patterns in multiple tonal centers at various tempos.


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The Real Book - Volume III
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