Chord Distribution Analysis

Chord SymbolCountFrequency
Bbm7615.8%
Abmaj7410.5%
Eb7410.5%
B0725.3%
Ebm725.3%
Ab725.3%
Dbm725.3%
Gb725.3%

Key Patterns Detected

PatternFunctionFrequency
Bbm7 -> Eb7Setup (Major Key)4
Eb7 -> Abmaj7Resolution (Major)3
Ebm7 -> Ab7Setup (Major Key)2
Ab7 -> Dbm7Resolution (Minor)2
Dbm7 -> Gb7Setup (Major Key)2
Fm7 -> Bb7Setup (Major Key)2
Bb7 -> Ebmaj7Resolution (Major)2
Dm7 -> G7Setup (Major Key)1
G7 -> Cmaj7Resolution (Major)1

Harmonic Highlights

  • Utilizes a #ii°7 (B°7) passing chord to create smooth chromatic tension between Bbm7 and the subsequent harmonic development.
  • Features a sudden modulation to C major (the major III) via a ii-V (Dm7-G7), a hallmark of sophisticated bebop composition.
  • Employs subdominant minor substitutions (Dbm7-Gb7) and descending ii-V sequences (Cm7-Bm7-Bbm7) that challenge standard diatonic expectations.

Improvisation Focus Fluid navigation of rapid modulations using guide-tone connecting and bebop scales to bridge disparate tonal centers (Ab, C, and Db).

Difficulty Rating 4/5. The fast harmonic rhythm and frequent shifts to non-diatonic keys require advanced harmonic awareness and the ability to transpose patterns instantly.


📚 Standard Available in:

The Real Bebop Book
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