Chord Distribution Analysis

Chord SymbolCountFrequency
Ebm7820.5%
Dbmaj7410.3%
Fm737.7%
B7#1125.1%
Bb7b1325.1%
Ab7alt25.1%
Em725.1%
Eb725.1%

Key Patterns Detected

PatternFunctionFrequency
Bb7b13 -> Ebm7Resolution (Minor)2
Ebm7 -> Ab7altSetup (Major Key)2
Ab7alt -> Dbmaj7Resolution (Major)2
Dbmaj7 -> Ab7Setup (Major Key)1
Db7 -> Gbmaj7Resolution (Major)1
F#m7 -> B7Setup (Major Key)1
B7 -> Emaj7Resolution (Major)1
Ebm7 -> Ab7#5Setup (Major Key)1
Dbmaj7 -> Gb7Setup (Major Key)1
Fm7 -> Bb7Setup (Major Key)1
Bb7 -> Ebm7Resolution (Minor)1
Ebm7 -> Ab7Setup (Major Key)1

Harmonic Highlights

  • The opening utilizes a chromatic bVI7 (B7#11) to V7 (Bb7b13) resolution, creating sophisticated minor-key tension before reaching the tonic.
  • Frequent ii-V-I shifts into Db Major provide tonal relief and contrast against the established Eb minor environment.
  • Chromatic side-slipping (Fm7 - Em7 - Ebm7) requires linear voice leading through parallel minor seventh structures.
  • A sudden modulation to E Major via a ii-V (F#m7 - B7) introduces a remote tonal center, typical of Gryce’s sophisticated bebop-era writing.

Improvisation Focus Navigating the rapid functional shifts between Eb minor and the disparate major centers of Db and E.

Difficulty Rating 3/5. The tune demands agility to handle sudden modulations and non-diatonic substitutions while maintaining a cohesive melodic line.