Chord Distribution Analysis

Chord SymbolCountFrequency
D69725.0%
C69725.0%
G6927.1%
F6927.1%
Bm713.6%
Bb713.6%
Am713.6%
D7#913.6%

Key Patterns Detected

PatternFunctionFrequency
Am7 -> D7#9Setup (Major Key)1

Harmonic Highlights

  • Employs parallel major 6/9 structures (D69-C69 and G69-F69), utilizing the bVII chord to create a bluesy, Mixolydian-influenced modal environment.
  • Features a chromatic descending turnaround (Bm7-Bb7-Am7-D7#9), where Bb7 acts as a tritone substitution for the secondary dominant E7 (VI7).
  • The transition from the D-C vamp to the G-F vamp shifts the tonal focus from the dominant area to the tonic, reinforcing a “constant structure” harmonic approach.
  • Utilizes a bII7 (Ab7#11) as a chromatic approach chord or tritone substitute to resolve back to the tonic G.

Improvisation Focus G Major Pentatonic / G Mixolydian to emphasize the blues-inflected bVII changes while maintaining the bright, major character of the 6/9 chords.

Difficulty Rating 2 (Intermediate-Beginner): The repetitive parallel movement and standard chromatic turnarounds are predictable, making it approachable for players familiar with basic tritone substitutions and 3/4 time.


📚 Standard Available in:

The Real Book - Volume V
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