Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| A7 | 7 | 30.4% |
| Bb7 | 6 | 26.1% |
| Dm6 | 4 | 17.4% |
| Bm7b5 | 4 | 17.4% |
| Gm7 | 2 | 8.7% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| A7 -> Dm6 | Resolution (Minor) | 3 |
Harmonic Highlights:
- The core progression features Dm6 (i6) establishing a distinct minor modality.
- A characteristic blues-inflected movement is seen in Bm7b5 - Bb7 - A7 (a form of viiø/III - bVI7 - V7), where Bb7 often acts as a tritone substitution or chromatically descending approach to A7.
- Repeated use of the bVI7 - V7 (Bb7 - A7) cadence strongly drives harmonic tension towards the D minor tonic.
Improvisation Focus: D Harmonic Minor scale, emphasizing the leading tone over A7.
Difficulty Rating: 3/5. It requires navigating minor key harmony, including the distinctive bVI7 - V7 cadence and the specific half-diminished chord, making it more challenging than basic diatonic progressions.