Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Em7 | 19 | 20.7% |
| Dmaj7 | 17 | 18.5% |
| A7 | 13 | 14.1% |
| B7b9 | 12 | 13.0% |
| D6 | 8 | 8.7% |
| Dm6 | 4 | 4.3% |
| C7 | 3 | 3.3% |
| B7b13 | 2 | 2.2% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Em7 -> A7 | Setup (Major Key) | 12 |
| A7 -> Dmaj7 | Resolution (Major) | 8 |
| A7 -> Em7 | Resolution (Minor) | 3 |
| B7b13 -> Em7 | Resolution (Minor) | 1 |
| B7b9 -> Em | Resolution (Minor) | 1 |
| Gm6 -> C7 | Setup (Major Key) | 1 |
| Bm7 -> E7 | Setup (Major Key) | 1 |
Harmonic Highlights:
- The characteristic oscillation between D6 and Dm6 functions as modal interchange (parallel major/minor borrowing), providing a distinctive harmonic color within the tonic sections.
- B7b13 serves as a secondary dominant (V7/ii), temporarily tonicizing Em7 and introducing a b13 tension before the main ii-V-I resolution.
- The repeated Em7-A7 sequence constitutes an extended ii-V progression, building strong dominant function and resolution towards the tonic D major.
Improvisation Focus: Navigating the modal interchange between D Major (for D6) and D Dorian (for Dm6) in the tonic area.
Difficulty Rating: 3 (Intermediate). Requires a solid understanding of modal interchange and secondary dominant functions within a clear tonal center.