Chord Distribution Analysis

Chord SymbolCountFrequency
Am7215.4%
Dbmaj7215.4%
Bm7b5215.4%
E7#9215.4%
Cm717.7%
F7b917.7%
Bbmaj717.7%
Abm717.7%

Key Patterns Detected

PatternFunctionFrequency
Bm7b5 -> E7#9Setup (Minor Key)2
E7#9 -> Am7Resolution (Minor)1
Cm7 -> F7b9Setup (Major Key)1
F7b9 -> Bbmaj7Resolution (Major)1
Abm7 -> Db7Setup (Major Key)1

Harmonic Highlights

  • The primary harmonic motif involves a chromatic mediant-like shift from Am7 to Dbmaj7, creating a haunting lift that bypasses traditional diatonic function.
  • Functional minor ii-V-i units (Bm7b5โ€“E7#9โ€“Am7) provide brief moments of tonal stability between periods of chromatic expansion.
  • The composition utilizes sequential ii-V-I modulations that descend by whole steps (Cm7โ€“F7 to Bbmaj7, then Abm7โ€“Db7 to Gbmaj7), demanding rapid harmonic re-orientation.

Improvisation Focus Navigating non-functional shifts using A Melodic Minor and switching to Db Lydian to capture the “bright” extension of the bIVmaj7 chord.

Difficulty Rating 4/5: The tune is advanced due to its unconventional modulations and the requirement to connect disparate key centers seamlessly during improvisation.


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The Real Book - Volume I
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