Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| A7 | 9 | 11.0% |
| Dm | 7 | 8.5% |
| E7 | 7 | 8.5% |
| E7b9/B | 5 | 6.1% |
| A7b9 | 5 | 6.1% |
| Em7 | 5 | 6.1% |
| Bbmaj7 | 3 | 3.7% |
| Dm7/C | 3 | 3.7% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| A7b9 -> Dm | Resolution (Minor) | 5 |
| A7 -> Dm | Resolution (Minor) | 2 |
| Em7b5/Bb -> A7b9 | Setup (Minor Key) | 2 |
| Em7b5 -> A7 | Setup (Minor Key) | 2 |
| A7 -> Dmaj7 | Resolution (Major) | 2 |
| F#m7 -> B7 | Setup (Major Key) | 2 |
| Gm9 -> C7 | Setup (Major Key) | 1 |
| C7 -> Fmaj9 | Resolution (Major) | 1 |
| B07 -> Em | Resolution (Minor) | 1 |
| Em -> A7 | Setup (Major Key) | 1 |
| A7 -> Dm7 | Resolution (Minor) | 1 |
| Dm7 -> A7 | Setup (Major Key) | 1 |
| Bm7b5 -> E7 | Setup (Minor Key) | 1 |
| E7 -> Am | Resolution (Minor) | 1 |
| Em7b5 -> A7b9 | Setup (Minor Key) | 1 |
| D7b9 -> Gm | Resolution (Minor) | 1 |
| Em7 -> A7 | Setup (Major Key) | 1 |
| B7/D# -> Em7 | Resolution (Minor) | 1 |
| Em7 -> A7sus | Setup (Major Key) | 1 |
| Bm7 -> E7 | Setup (Major Key) | 1 |
| F#7 -> Bm7 | Resolution (Minor) | 1 |
| Am7 -> D7 | Setup (Major Key) | 1 |
| D7 -> Gmaj7 | Resolution (Major) | 1 |
Harmonic Highlights
- Modal Interchange: Frequent shifts between implied D major and parallel D minor harmonies (e.g., Em7b5-A7-Dm), a defining Bossa Nova characteristic.
- Relative Key Tonicization: The Gm9-C7-Fmaj9 progression provides a strong ii-V-I to F major, functioning as the relative major of D minor or bIII of D major.
- Chromaticism: Chords like B07 and E7b9/B introduce non-diatonic color, contributing to secondary dominant and passing diminished functions.
Improvisation Focus Navigating parallel major/minor tonalities through chord tone outlining and appropriate modal adjustments.
Difficulty Rating 4 (Intermediate-Advanced) due to the frequent modal interchange and navigating chromatic and altered dominant chords.