Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bbm6 | 9 | 28.1% |
| Cm7b5 | 8 | 25.0% |
| F7b9 | 8 | 25.0% |
| Ebm7 | 2 | 6.2% |
| Fm7b5 | 1 | 3.1% |
| Bb7b9 | 1 | 3.1% |
| Em7b5 | 1 | 3.1% |
| Ab7b9 | 1 | 3.1% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Cm7b5 -> F7b9 | Setup (Minor Key) | 8 |
| F7b9 -> Bbm6 | Resolution (Minor) | 7 |
| Fm7b5 -> Bb7b9 | Setup (Minor Key) | 1 |
| Bb7b9 -> Ebm7 | Resolution (Minor) | 1 |
| Ab7b9 -> Dbmaj7 | Resolution (Major) | 1 |
Harmonic Highlights:
- The initial Bbm6 immediately establishes a parallel minor tonicization, despite the stated Bb major key center, reinforced by its minor ii-V-i progression (Cm7b5-F7b9).
- Features prominent modulations via sequential ii-V progressions, transitioning from Bbm to Ebm via Fm7b5-Bb7b9-Ebm7.
- Includes a significant non-diatonic key shift from Ebm to Db major via Em7b5-Ab7b9-Dbmaj7, demonstrating rapid tonal movement.
- The consistent use of the b9 alteration on dominant chords (e.g., F7b9, Bb7b9, Ab7b9) provides characteristic bebop chromaticism and tension.
Improvisation Focus: Altered Scale (Super Locrian) over the dominant 7b9 chords.
Difficulty Rating: 4 (Advanced Intermediate). The constant, rapid modulations through several non-diatonic key centers and prevalent altered dominants demand precise harmonic awareness and agile navigation.