Chord Distribution Analysis

Chord SymbolCountFrequency
Bm9833.3%
Bbmaj7#11416.7%
A13sus416.7%
G69416.7%
Bbmaj9#11416.7%

No obvious ii-V patterns detected.


Harmonic Highlights:

  • The progression utilizes descending stepwise root motion (B-Bb-A-G), creating a “floating” modal atmosphere that avoids traditional V-I functional resolutions.
  • Bbmaj7#11 functions as a non-diatonic Lydian neighbor chord, providing a cinematic, bright contrast to the B minor tonic center.
  • Constant use of upper extensions (9, 13sus, 69) emphasizes harmonic color and “shimmer,” a hallmark of the Pat Metheny/Lyle Mays compositional style.

Improvisation Focus: Modal interchange, specifically shifting between B Aeolian and Bb Lydian.

Difficulty Rating: 3 (Intermediate). While the slow harmonic rhythm is forgiving, the performer must accurately navigate non-functional chromatic shifts and maintain melodic continuity across the modal changes.


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The Real Book - Volume II
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