Chord Distribution Analysis

Chord SymbolCountFrequency
Cm747.4%
Ebmaj735.6%
Fm735.6%
Eb623.7%
Fm7b523.7%
Bb7b923.7%
Gm7/D23.7%
B0723.7%

Key Patterns Detected

PatternFunctionFrequency
Fm7b5 -> Bb7b9Setup (Minor Key)2
Bb7b9 -> Ebmaj7Resolution (Major)2
Am7b5 -> D7b9Setup (Minor Key)1
D7b9 -> Gm7Resolution (Minor)1
Abm7 -> Db7Setup (Major Key)1
Db7 -> Gbmaj7Resolution (Major)1
Gbmaj7 -> Db7susSetup (Major Key)1
Gbmaj7/Db -> Db7susSetup (Major Key)1
Bbmaj7/F -> F7b9Setup (Major Key)1
Am7b5 -> D7Setup (Minor Key)1
D7 -> Gmaj7Resolution (Major)1
G7 -> Cm7Resolution (Minor)1
Fm7 -> Bb7susSetup (Major Key)1

Harmonic Highlights

  • The use of minor ii-V progressions (Fm7b5 - Bb7b9) resolving to a major tonic (Eb6) provides a sophisticated, dark-to-light harmonic tension common in Berlin’s writing.
  • A secondary ii-V (Am7b5 - D7b9) targeting Gm7 establishes the mediant as a temporary tonal center through chromatic leading.
  • A significant modulation to Gb Major (bIII) occurs via a ii-V (Abm7 - Db7), utilizing modal interchange to shift the tonal center.
  • Chromatic voice leading is reinforced by the B°7 passing chord, bridging the gap between Cm7 and the Ebmaj7/Bb tonic inversion.

Improvisation Focus Navigating non-diatonic ii-V-I sequences and the temporary shift to the Gb Major tonal center.

Difficulty Rating 3/5: The frequent use of minor ii-V patterns and the modulation to the bIII key requires an intermediate understanding of chord-scale relationships beyond Eb major.