Chord Distribution Analysis

Chord SymbolCountFrequency
Ebmaj759.4%
Fm7b547.5%
Bb7b1347.5%
Gm735.7%
Db735.7%
D735.7%
Bb735.7%
Abm723.8%

Key Patterns Detected

PatternFunctionFrequency
Fm7b5 -> Bb7b13Setup (Minor Key)4
Abm7 -> Db7Setup (Major Key)2
Db7 -> Gbmaj7Resolution (Major)2
Bb7b13 -> Ebm7Resolution (Minor)2
Am7 -> D7Setup (Major Key)2
Bb7 -> Ebmaj7Resolution (Major)2
Fm7 -> Bb7Setup (Major Key)2
Bm7 -> E7b9Setup (Major Key)1
E7b9 -> Am7Resolution (Minor)1
D7 -> Gmaj7Resolution (Major)1
Bb7b13 -> Ebmaj7Resolution (Major)1
Bbm7 -> Eb7Setup (Major Key)1
Eb7 -> Abmaj7Resolution (Major)1
Abmaj7 -> Db7Setup (Major Key)1
Am7b5 -> D7Setup (Minor Key)1
D7 -> Gm7Resolution (Minor)1
Gm7 -> C7Setup (Major Key)1
C7 -> Fm7Resolution (Minor)1

Harmonic Highlights

  • Frequent modal interchange moves the harmony from Eb major through Abm7-Db7 to Gbmaj7 (bIII), creating a sophisticated excursion into the parallel minor’s relative major.
  • A #IV diminished chord (Ao7) functions as a chromatic passing tone between the IV chord (Abmaj7) and the tonic in second inversion (Eb6/Bb), facilitating smooth scalar voice leading.
  • The bridge employs sequential ii-V progressions (Am7-D7 to Bm7-E7) to pivot into the key of G Major, shifting the tonal center by a chromatic major third from the tonic Eb.

Improvisation Focus Voice-leading through chromatic ii-V sequences and navigating rapid shifts between distant tonal centers (Eb, Gb, and G).

Difficulty Rating 4/5. The dense harmonic rhythm and frequent modulations to non-diatonic keys require advanced theoretical knowledge and precise melodic targeting.


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The Real Book - Volume VI
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