Chord Distribution Analysis

Chord SymbolCountFrequency
F7716.7%
Cm7511.9%
Bb/D49.5%
G749.5%
Bb37.1%
Bbmaj737.1%
C#024.8%
Dbm724.8%

Key Patterns Detected

PatternFunctionFrequency
Cm7 -> F7Setup (Major Key)3
F7 -> Bbmaj7Resolution (Major)3
F7 -> Bbmaj7/DResolution (Major)1

Harmonic Highlights

  • The progression features a signature ascending chromatic cliché: I - iim7 - #iio7 - I/3 (Bb - Cm7 - C#o7 - Bb/D), providing smooth voice leading through the diminished passing chord.
  • A chromatic parallel descent occurs in the turnaround: Bb/D - Dbm7 - Cm7 - F7, utilizing a bIIIm7 passing chord to connect the mediant to the supertonic.
  • The transition to the IV chord employs a descending bass line (Bb - Bb7/Ab - Eb/G - Ebm/Gb), moving from a secondary dominant to a minor subdominant (iv) for a classic “plagal” coloration.

Improvisation Focus The Bb Major Blues scale integrated with chord tone targeting, specifically highlighting the b3 (Db) over the Ebm6 chord.

Difficulty Rating 3 (Intermediate): The standard requires navigating frequent chromatic passing chords and maintaining melodic continuity over a moving, non-diatonic bass line.


📚 Standard Available in:

The Real Book - Volume II
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