Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| D7 | 10 | 25.0% |
| G7 | 9 | 22.5% |
| C6 | 4 | 10.0% |
| A7 | 4 | 10.0% |
| Ab7 | 3 | 7.5% |
| Ebm7 | 2 | 5.0% |
| C7 | 2 | 5.0% |
| Bb7 | 2 | 5.0% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Ebm7 -> Ab7 | Setup (Major Key) | 2 |
Harmonic Highlights:
- V7-V7/IV-IV progression (D7-G7-C6) temporarily tonicizes the subdominant.
- Sophisticated ii-V (Ebm7-Ab7) implies a tritone substitution for D7, briefly shifting to Db major.
- A chromatically descending dominant chain (C7-Bb7-A7-D7) builds tension, guiding back towards the tonic via V7.
- The E7-Eb7 pair showcases chromatic dominant movement, suggesting secondary dominants and their tritone substitutes.
Improvisation Focus: Applying Altered and Lydian Dominant scales over the various dominant 7th chords and their substitutions.
Difficulty Rating: 4/5 – Requires solid understanding of dominant alterations, tritone substitutions, and navigating rapid key center shifts.