Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bb7 | 9 | 19.6% |
| Fm7 | 8 | 17.4% |
| Ebmaj7 | 7 | 15.2% |
| C7b13 | 4 | 8.7% |
| Eb6 | 3 | 6.5% |
| G7 | 3 | 6.5% |
| Cmaj7 | 3 | 6.5% |
| C7 | 2 | 4.3% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Fm7 -> Bb7 | Setup (Major Key) | 6 |
| Bb7 -> Ebmaj7 | Resolution (Major) | 6 |
| C7b13 -> Fm7 | Resolution (Minor) | 4 |
| G7 -> Cmaj7 | Resolution (Major) | 3 |
| C7 -> Fm7 | Resolution (Minor) | 2 |
| Cmaj7 -> G7 | Setup (Major Key) | 1 |
| Dm7 -> G7 | Setup (Major Key) | 1 |
| Ebmaj7 -> Bb7 | Setup (Major Key) | 1 |
| Cm7 -> F7 | Setup (Major Key) | 1 |
| Ebmaj7/Bb -> Bb7 | Setup (Major Key) | 1 |
Harmonic Highlights:
- Establishes tonic Eb major with classic ii-V-I progressions (Fm7-Bb7-Ebmaj7).
- Features secondary dominant C7b13 (V7/ii) resolving effectively to Fm7.
- Incorporates Gershwin’s signature iv minor chord (Abm7), borrowing from the parallel minor mode.
- Undertakes a distinct modulation to C major through a strong G7-Cmaj7 progression.
Improvisation Focus: Navigating functional harmony and chord-scale relationships across ii-V-I progressions and the modulation to C major.
Difficulty Rating: 3 (Intermediate) - The combination of standard progressions, secondary dominants, modal mixture, and a clear modulation to C major requires adaptable harmonic understanding.