Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Bbm7 | 8 | 66.7% |
| Eb7 | 2 | 16.7% |
| A13 | 1 | 8.3% |
| B13 | 1 | 8.3% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Bbm7 -> Eb7 | Setup (Major Key) | 1 |
| Eb7 -> Bbm7 | Resolution (Minor) | 1 |
Harmonic Highlights
- Prolonged use of Bbm7, functioning as the vi minor in the C# (Db) major key center, establishing a foundational modal quality.
- The Eb7 chord acts as a V7/IV (V7 of Ab), introducing a strong secondary dominant function that temporarily pulls the harmony towards Ab major.
- Highly chromatic dominant 13th chords (A13, B13) provide abrupt, non-diatonic shifts, creating tension and side-slipping motion.
- The ascending half-step movement between A13 and B13 before resolving to Bbm7 showcases advanced chromatic voice leading, defying typical functional resolution.
Improvisation Focus Navigating chromatic dominant 7th scales (altered, Lydian dominant) over the A13 and B13 chords.
Difficulty Rating 5 (Advanced) - The unconventional key center combined with significant chromaticism and non-diatonic dominant chords demands sophisticated harmonic understanding and navigation.