Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bb7 | 10 | 19.2% |
| Fm7 | 8 | 15.4% |
| Eb6 | 4 | 7.7% |
| Gm7 | 4 | 7.7% |
| C7 | 4 | 7.7% |
| E07 | 2 | 3.8% |
| Gb07 | 2 | 3.8% |
| Bbm7 | 2 | 3.8% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Fm7 -> Bb7 | Setup (Major Key) | 8 |
| Bbm7 -> Eb7 | Setup (Major Key) | 2 |
| Eb7 -> Abmaj7 | Resolution (Major) | 2 |
| Abmaj7 -> Db7 | Setup (Major Key) | 2 |
| Gm7 -> C7 | Setup (Major Key) | 2 |
| C7 -> Fm7 | Resolution (Minor) | 2 |
| Bb7 -> Ebmaj7 | Resolution (Major) | 1 |
| G7b9 -> Cm7 | Resolution (Minor) | 1 |
Harmonic Highlights:
- Prominent use of chromatic diminished chords (e.g., E°7, Gb°7) functioning as passing chords or vii°7 substitutes before ii-V progressions.
- Frequent secondary dominant usage (e.g., C7 to Fm7, D7 to G7) creating extended dominant cycles and temporary V-I resolutions.
- The Bbm7-Eb7-Abmaj7 progression introduces a temporary Ab major tonality (bVI/Eb), often referred to as a “backdoor” ii-V-I.
Improvisation Focus: Adapting to rapid harmonic changes via precise chord tone targeting.
Difficulty Rating: 4 (Advanced). The rapid harmonic rhythm, frequent secondary dominants, and chromatic alterations demand sophisticated chord tone recognition and scale adaptation.