Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| D7 | 11 | 28.9% |
| Am7 | 9 | 23.7% |
| A7 | 4 | 10.5% |
| Gmaj7 | 2 | 5.3% |
| Gb7 | 2 | 5.3% |
| F7 | 2 | 5.3% |
| E7 | 2 | 5.3% |
| G6 | 2 | 5.3% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Am7 -> D7 | Setup (Major Key) | 9 |
| D7 -> Am7 | Resolution (Minor) | 7 |
| D7 -> Gmaj7 | Resolution (Major) | 2 |
| G7 -> Cmaj7 | Resolution (Major) | 1 |
Harmonic Highlights:
- The opening features a distinctive i-V7/VI vamp (Am7-D7), repeatedly pulling towards G major while maintaining the A minor tonic, creating a cyclical tension.
- A section employs a chromatic descending dominant progression (Gb7-F7-E7) following Gmaj7, providing a rich, blues-infused movement back to the tonic’s dominant.
- The standard incorporates elements of both A minor and G major (Gmaj7, G6/7), along with Cmaj7 (bIII in A minor), suggesting a blend of modal and functional harmony.
- Frequent secondary dominant usage (A7 to D7, D7 to G, G7 to C) drives the progression, typical of swing era harmony.
Improvisation Focus: Mixolydian scales over the numerous dominant 7th chords.
Difficulty Rating: 4 (Advanced Intermediate) – The rapid chromatic dominant changes and the blend of minor/major tonalities require agile harmonic thinking and scale application.