Chord Distribution Analysis

Chord SymbolCountFrequency
Bb516.1%
G7412.9%
C7412.9%
F7412.9%
Fm726.5%
Bb726.5%
Eb726.5%
E0726.5%

Key Patterns Detected

PatternFunctionFrequency
Fm7 -> Bb7Setup (Major Key)2
G7 -> Cm7Resolution (Minor)2

Harmonic Highlights

  • Utilizes a secondary ii-V (Fm7 - Bb7) to tonicize the IV chord (Eb7), establishing a classic blues-inflected jazz foundation.
  • Features a #IV diminished passing chord (Edim7) to create chromatic voice leading between the IV7 and the return to the tonic Bb.
  • Incorporates a bVII7 (Ab7) acting as a “backdoor” dominant or chromatic approach to the VI7 (G7), smoothing the transition to the ii-V-I turnaround.
  • Employs a standard “Rhythm Changes” style bridge using an extended cycle of dominants (D7 - G7 - C7 - F7) to build harmonic tension.

Improvisation Focus Bb Major Blues scale combined with Mixolydian guide-tone targeting over the dominant cycles.

Difficulty Rating 2/5. The progression relies on highly predictable functional harmony and standard circle-of-fifths movements, making it an ideal entry point for intermediate improvisers.


📚 Standard Available in:

The Real Book - Volume VI
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