Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bbm7 | 6 | 10.3% |
| Eb7 | 6 | 10.3% |
| Ab7 | 6 | 10.3% |
| Dbmaj7 | 4 | 6.9% |
| Fm7b5 | 4 | 6.9% |
| Bb7b9 | 4 | 6.9% |
| Ebm7 | 4 | 6.9% |
| A7 | 4 | 6.9% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Fm7b5 -> Bb7b9 | Setup (Minor Key) | 4 |
| Ebm7 -> Ab7 | Setup (Major Key) | 4 |
| Ab7 -> Dbmaj7 | Resolution (Major) | 3 |
| Cm7b5 -> F7b9 | Setup (Minor Key) | 2 |
| F7b9 -> Bbm7 | Resolution (Minor) | 2 |
| Bb7b9 -> Fm7b5 | Resolution (Minor) | 2 |
| Bbm7 -> Eb7 | Setup (Major Key) | 2 |
| Dbmaj7 -> Ab7 | Setup (Major Key) | 1 |
| Eb7 -> Bbm7 | Resolution (Minor) | 1 |
| Em7 -> A7 | Setup (Major Key) | 1 |
Harmonic Highlights:
- Frequent use of iiø7-V7b9 progressions establishes temporary tonics in Bb minor, Eb minor, and Db major.
- Prominent tritone substitutions (Gb7#11 for C7; Gb7 for C7) introduce altered dominant tension and chromaticism.
- The progression frequently shifts between the tonic Bb minor and its relative major Db, with detours through Eb minor.
- The Bbm7/Ab to Gm7b5 descent creates a non-diatonic harmonic sequence often implying a minor ii-V-I movement.
Improvisation Focus: Melodic Minor and its modes.
Difficulty Rating: 4 (Advanced Intermediate) - The extensive use of altered dominants, tritone substitutions, and temporary modulations demands sophisticated harmonic understanding.