Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bbm7 | 6 | 16.2% |
| Eb7 | 5 | 13.5% |
| Abmaj7 | 5 | 13.5% |
| Cm7 | 3 | 8.1% |
| Gb9 | 3 | 8.1% |
| Dbmaj7 | 3 | 8.1% |
| Ab6 | 2 | 5.4% |
| B07 | 1 | 2.7% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Bbm7 -> Eb7 | Setup (Major Key) | 5 |
| Eb7 -> Abmaj7 | Resolution (Major) | 2 |
| Gm7b5 -> C7 | Setup (Minor Key) | 1 |
| C7 -> Fm7 | Resolution (Minor) | 1 |
| Fm7 -> Bb7 | Setup (Major Key) | 1 |
| Eb7 -> Bbm7 | Resolution (Minor) | 1 |
| Ebm7 -> Ab7 | Setup (Major Key) | 1 |
| Ab7 -> Dbmaj7 | Resolution (Major) | 1 |
| Cm7 -> F7 | Setup (Major Key) | 1 |
| F7 -> Bbm7 | Resolution (Minor) | 1 |
| Cm7 -> F7b9 | Setup (Major Key) | 1 |
Harmonic Highlights:
- Standard II-V-I movements (Bbm7-Eb7-Abmaj7) firmly establish the Ab major key center.
- The backdoor dominant progression (Dbm6 - Gb9) provides a smooth, blues-inflected approach to the tonic Ab.
- A brief secondary dominant progression (Gm7b5 - C7 - Fm7) creates a temporary tonicization of F minor.
- The
Cm7 - B07 - Bbm7movement utilizes B07 as a common-tone diminished passing chord (sharing F and Ab) leading chromatically into the subsequent Bbm7.
Improvisation Focus: Targeting chord tones and outlining the II-V-I and backdoor dominant progressions.
Difficulty Rating: 3 - The standard II-V-I progressions are straightforward, but the inclusion of backdoor dominants and brief modulations requires focused harmonic understanding.