Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Dbmaj7 | 4 | 11.8% |
| Abm7 | 3 | 8.8% |
| Db7 | 3 | 8.8% |
| Bbm7 | 3 | 8.8% |
| Eb7 | 3 | 8.8% |
| Gm7b5 | 2 | 5.9% |
| C7b9 | 2 | 5.9% |
| Fm7b5 | 2 | 5.9% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Gm7b5 -> C7b9 | Setup (Minor Key) | 2 |
| C7b9 -> Fm7b5 | Resolution (Minor) | 2 |
| Fm7b5 -> Bb7b9 | Setup (Minor Key) | 2 |
| Bb7b9 -> Ebm7b5 | Resolution (Minor) | 2 |
| Ebm7b5 -> Ab7b9 | Setup (Minor Key) | 2 |
| Ab7b9 -> Dbmaj7 | Resolution (Major) | 2 |
| Abm7 -> Db7 | Setup (Major Key) | 2 |
| Bbm7 -> Eb7 | Setup (Major Key) | 2 |
| Db7 -> Abm7 | Resolution (Minor) | 1 |
| Db7 -> Gbmaj7 | Resolution (Major) | 1 |
| Eb7 -> Bbm7 | Resolution (Minor) | 1 |
| Eb7 -> Abmaj7 | Resolution (Major) | 1 |
Harmonic Highlights
- Sequential minor ii-V progressions (ii-V of Fm, Bbm, and Ebm) create a descending chain of tension that defines the A section’s harmonic motion.
- The composition utilizes “minor-to-major” resolution, where minor ii-V cells unexpectedly resolve to a Dbmaj7 tonic, creating a signature Bebop modal mixture.
- The bridge employs parallel shifting ii-V cells (Abm7-Db7 moving to Am7-D7), momentarily destabilizing the tonal center before cycling back to the primary key.
- Symmetrical movement is key; the root motion of the ii-V sequences moves in descending whole steps, a classic Dizzy Gillespie structural device.
Improvisation Focus Mastering the Locrian #2 scale over the half-diminished chords and the Altered scale over the V7b9 chords to navigate the rapid minor ii-V sequences.
Difficulty Rating 4/5. The rapid succession of non-diatonic minor ii-V cycles and the atypical resolution to major require advanced harmonic fluency and precise voice-leading at high tempos.