Chord Distribution Analysis

Chord SymbolCountFrequency
F7718.4%
Bb6513.2%
Gm7410.5%
Cm7410.5%
G7410.5%
Dm725.3%
Bb7/D25.3%
Eb625.3%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)4
Dm7 -> G7Setup (Major Key)2
G7 -> Cm7Resolution (Minor)2
Gm7 -> D7Setup (Major Key)1

Harmonic Highlights

  • Utilizes a standard “Rhythm Changes” structure in Bb major, characterized by a high-velocity I-vi-ii-V harmonic rhythm.
  • The A-section turnaround incorporates a chromatic ascent from the IV chord (Eb6) via a diminished passing chord (E°7) to the tonic (Bb6/F).
  • The bridge employs an extended cycle of fifths (D7–G7–C7–F7), using dominant seventh shells to create forward motion toward the final A section.

Improvisation Focus Rhythm Changes vocabulary, specifically targeting 3rds and 7ths to navigate the rapid dominant cycle in the bridge.

Difficulty Rating 4/5. The typically extreme tempo and relentless two-beats-per-chord harmonic rhythm require advanced technical facility and precise voice-leading mastery.


📚 Standard Available in:

The Real Book - Volume I
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