Chord Distribution Analysis

Chord SymbolCountFrequency
C7420.0%
Bm7420.0%
E7420.0%
D6210.0%
Dmaj7210.0%
A7210.0%
Gm715.0%
Em715.0%

Key Patterns Detected

PatternFunctionFrequency
Bm7 -> E7Setup (Major Key)4
E7 -> Bm7Resolution (Minor)2
Gm7 -> C7Setup (Major Key)1
Em7 -> A7Setup (Major Key)1
A7 -> Dmaj7Resolution (Major)1

Harmonic Highlights

  • The transition from D6 to C7 utilizes a bVII7 “backdoor dominant” movement, creating recurring chromatic tension against the D major tonic.
  • Repeated secondary II-V patterns (Bm7–E7) prolong harmonic motion, functioning as an extended approach to the dominant A7 or the relative minor.
  • The Gm7–C7 sequence functions as a iv–bVII modal interchange, providing a brief subdominant minor color before resolving back to Dmaj7.

Improvisation Focus Guide-tone targeting of the flat-7 (C natural) and natural 11 (G) to bridge the transition between the D major scale and the recurring backdoor dominants.

Difficulty Rating 3/5: The non-diatonic shifts and 3/4 waltz meter demand intermediate harmonic awareness and solid rhythmic phrasing to navigate the changes fluently.