Chord Distribution Analysis

Chord SymbolCountFrequency
F71022.2%
Cm7511.1%
Bb648.9%
Gm748.9%
Dm736.7%
Bb6/F36.7%
G736.7%
Bb724.4%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)5
Dm7 -> G7Setup (Major Key)1
G7 -> Cm7Resolution (Minor)1

Harmonic Highlights

  • The A-section utilizes the foundational I-vi-ii-V turnaround (Bb6-Gm7-Cm7-F7), establishing a cyclical diatonic movement common in the “Rhythm Changes” idiom.
  • The bridge (B-section) shifts to a sequential “Cycle of Fourths” using dominant seventh chords (D7-G7-C7-F7), creating a series of secondary dominant resolutions.
  • Chromatic voice leading is highlighted in the final A-section via the IV to #IV diminished movement (Eb7 to E°7), providing a smooth transition to the Bb/F (tonic 6/4) cadence.
  1. Improvisation Focus The Bb Major Pentatonic/Blues scale for the A-sections, combined with chord-tone targeting (3rds and 7ths) to navigate the rapid dominant cycles in the bridge.

  2. Difficulty Rating 3/5; the repetitive harmonic structure is approachable, but the typical “up-tempo” performance speed and the bridge’s modulating dominants require significant technical proficiency.


📚 Standard Available in:

The Real Book - Volume IV
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