Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bb7 | 8 | 25.0% |
| Eb7 | 4 | 12.5% |
| Ab7 | 3 | 9.4% |
| F7 | 3 | 9.4% |
| Bm7 | 2 | 6.2% |
| E7 | 2 | 6.2% |
| Cm7 | 2 | 6.2% |
| Ebm7 | 1 | 3.1% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Bm7 -> E7 | Setup (Major Key) | 2 |
| Ebm7 -> Ab7 | Setup (Major Key) | 1 |
| Dm7 -> G7 | Setup (Major Key) | 1 |
| C#m7 -> F#7 | Setup (Major Key) | 1 |
| Cm7 -> F7 | Setup (Major Key) | 1 |
| F7 -> Bbmaj7 | Resolution (Major) | 1 |
| Db7 -> Gbmaj7 | Resolution (Major) | 1 |
Harmonic Highlights:
- Prominent use of the bVII7 (Ab7) dominant, creating a characteristic blues sound through temporary tonicization or modal mixture within the Bb blues context.
- The recurring Bm7-E7 ii-V progression briefly tonicizes A major/minor before resolving to the IV7 (Eb7), introducing an unexpected non-diatonic harmonic detour.
- Sophisticated blend of the diatonic IV7 (Eb7) with its parallel minor iv minor (Ebm7), showcasing modal interchange within the blues form.
- The progression frequently utilizes dominant 7th chords (Bb7, Ab7, E7, Eb7, F7), demanding a strong command of blues and dominant harmony.
Improvisation Focus: Navigating Mixolydian scales and dominant alterations over the rapidly changing chord qualities.
Difficulty Rating: 4 (Advanced Intermediate) The frequent non-diatonic ii-V progressions and quick dominant substitutions demand agile harmonic thinking and precise scale choices.