Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| C7 | 9 | 15.5% |
| Gm7 | 9 | 15.5% |
| D7 | 7 | 12.1% |
| Fmaj7 | 6 | 10.3% |
| Am7 | 6 | 10.3% |
| Dm7 | 4 | 6.9% |
| Bm7b5 | 3 | 5.2% |
| G7 | 2 | 3.4% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Gm7 -> C7 | Setup (Major Key) | 6 |
| C7 -> Fmaj7 | Resolution (Major) | 4 |
| Am7 -> D7 | Setup (Major Key) | 3 |
| D7 -> Gm7 | Resolution (Minor) | 3 |
| C7 -> Gm7 | Resolution (Minor) | 2 |
| Bm7b5 -> E7 | Setup (Minor Key) | 1 |
| E7 -> Am7 | Resolution (Minor) | 1 |
| A7 -> Dm7 | Resolution (Minor) | 1 |
| Bbmaj7 -> Eb7 | Setup (Major Key) | 1 |
Harmonic Highlights:
- Secondary Dominants: Frequent use of secondary dominants (D7, G7, A7) to tonicize various diatonic and related minor chords, creating strong V7-I movements outside the primary key.
- Chromaticism & Substitution: The Bm7b5 - Bb7 progression introduces chromatic tension, with Bb7 potentially functioning as a tritone substitute for E7, resolving towards Am7.
- Extended II-V-I Chains: The sequence Am7 - D7 - Gm7 - A7 demonstrates an extended II-V-I in G minor, immediately followed by a dominant leading to D minor, requiring agile harmonic navigation.
- Modal Color: The Bbm6 chord (bIVm6) provides a brief, subtle minor plagal color, momentarily shifting the tonal palette before resolving back to the tonic Fmaj7.
Improvisation Focus: Navigating the numerous secondary dominants and their target resolutions using appropriate dominant and minor scale patterns.
Difficulty Rating: 3 (Intermediate) - The consistent use of secondary dominants, chromatic alterations, and non-diatonic chords requires a solid understanding of functional harmony and agile navigation.