Chord Distribution Analysis

Chord SymbolCountFrequency
Eb7922.5%
D7#9410.0%
Bmaj7410.0%
Gm737.5%
Abmaj737.5%
D737.5%
Bb737.5%
Dm725.0%

Key Patterns Detected

PatternFunctionFrequency
D7#9 -> Gm7Resolution (Minor)3
Dm7 -> G7Setup (Major Key)2
Eb7 -> Bbm7Resolution (Minor)1
Bbm7 -> Eb7Setup (Major Key)1
Am7 -> D7Setup (Major Key)1

Harmonic Highlights:

  • The composition utilizes an elongated 24-bar blues form, substituting traditional subdominant movements with chromatic sequences like VII7alt (D7#9) resolving to iii (Gm7).
  • Shorter employs chromatic mediant relationships, notably the shift from Abmaj7 to Bmaj7, which provides a modern “lifting” effect outside the Eb major tonality.
  • The turnaround features a rapid sequence of dominant cycles (C7-Gb7-F7-Bb7) that utilizes tritone substitutions to facilitate a smooth return to the tonic.

Improvisation Focus: The Eb Blues scale integrated with Melodic Minor applications (specifically Ab Melodic Minor over D7#9) to navigate the altered extensions.

Difficulty Rating: 4/5 - The non-standard 24-bar structure and rapid-fire non-diatonic changes require sophisticated voice leading and a departure from basic blues vocabulary.


๐Ÿ“š Standard Available in:

The Real Book - Volume I
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