Chord Distribution Analysis

Chord SymbolCountFrequency
Cm7820.5%
F7717.9%
Dm7410.3%
G737.7%
Gbmaj737.7%
Bbmaj725.1%
Eb725.1%
Ebm712.6%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)7
Dm7 -> G7Setup (Major Key)3
G7 -> Cm7Resolution (Minor)3
F7 -> Bbmaj7Resolution (Major)2
Bbmaj7 -> Eb7Setup (Major Key)2
Abm7 -> Db7Setup (Major Key)1
Db7 -> Gbmaj7Resolution (Major)1
Gm7 -> C7Setup (Major Key)1
Dm7b5 -> G7b9Setup (Minor Key)1
G7b9 -> Cm7Resolution (Minor)1

Harmonic Highlights

  • Utilizes classic ii-V-I cycles in Bb major (Cm7–F7–Bbmaj7) to establish a strong tonal center.
  • The bridge features a sudden modulation to the bVI key (Gb major) via a ii-V-I sequence (Abm7–Db7–Gbmaj7).
  • Employs chromatic descending motion (Dm7–Dbm7–Cm7) to create a smooth transition from the iii to the ii chord.
  • Incorporates secondary dominants such as G7 (V/ii) and C7 (V/V) to provide additional harmonic momentum toward the tonic.

Improvisation Focus

Guide-tone voice leading, specifically targeting the 3rds and 7ths to navigate the rapid ii-V-I resolutions and the bridge modulation.

Difficulty Rating

2/5: The harmony is largely predictable and diatonic, with the only significant challenge being the temporary shift to Gb major in the B-section.


📚 Standard Available in:

The Real Book - Volume I
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