Chord Distribution Analysis

Chord SymbolCountFrequency
Bb6718.9%
Cm7718.9%
F7718.9%
B038.1%
Bbmaj7/D38.1%
F7#525.4%
Bb7#525.4%
Ebmaj725.4%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)6
Bb7#5 -> Ebmaj7Resolution (Major)2
F7 -> Cm7Resolution (Minor)1

Harmonic Highlights

  • The #I° diminished chord (B°7) acts as a chromatic passing tone between the Bb6 tonic and the Cm7 supertonic, a hallmark of swing-era part-writing.
  • A descending chromatic sequence (Bbmaj7/D – Db°7 – Cm7) utilizes a bIII°7 chord to bridge the inverted tonic to the ii chord.
  • Frequent use of altered dominant tensions, specifically the F7#5, provides a more pungent resolution back to the Bb major tonic.

Improvisation Focus Bb Major Bebop Scale

Difficulty Rating 2/5. The progression utilizes predictable functional harmony and standard chromatic voice-leading, making it highly accessible for intermediate players.


📚 Standard Available in:

The Real Book - Volume III
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