Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Dm | 12 | 28.6% |
| Bb7 | 9 | 21.4% |
| A7 | 9 | 21.4% |
| Gm | 3 | 7.1% |
| D7 | 3 | 7.1% |
| G7 | 2 | 4.8% |
| C7 | 2 | 4.8% |
| Eb7 | 1 | 2.4% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| A7 -> Dm | Resolution (Minor) | 8 |
| D7 -> Gm | Resolution (Minor) | 1 |
Harmonic Highlights:
- The recurring Dm - Bb7 - A7 progression features Bb7 (bVI7) as a characteristic bluesy pre-dominant, effectively leading to the V7 (A7).
- A7 consistently provides a strong V7-i resolution to Dm, firmly establishing and reinforcing the D minor tonic.
- A distinctive Gm - Eb7 - D7 section introduces Eb7 as a tritone substitution for A7 (V7 of Dm), creating tension before D7 (V7/Gm).
- The D7 functions as a secondary dominant (V7/iv), preparing the resolution to Gm before the progression returns to the main D minor vamp.
Improvisation Focus: D Harmonic Minor scale.
Difficulty Rating: 3 (Intermediate). While the primary progression is repetitive, the inclusion of non-diatonic Bb7 and Eb7 requires attention to altered dominant and substitute harmonies.