Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| Eb7 | 9 | 21.4% |
| Bbm7 | 5 | 11.9% |
| Abmaj7 | 5 | 11.9% |
| Bbm7b5 | 5 | 11.9% |
| D7sus | 2 | 4.8% |
| D7 | 2 | 4.8% |
| Bb7 | 2 | 4.8% |
| Dbmaj7 | 2 | 4.8% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Bbm7 -> Eb7 | Setup (Major Key) | 5 |
| Eb7 -> Abmaj7 | Resolution (Major) | 4 |
| Bbm7b5 -> Eb7 | Setup (Minor Key) | 3 |
| Eb7 -> Bbm7b5 | Resolution (Minor) | 2 |
| Bm7 -> E7 | Setup (Major Key) | 1 |
| Ab7 -> Dbmaj7 | Resolution (Major) | 1 |
🎼 Sheet Music
Find Lead Sheet on Sheet Music Direct (PDF)Harmonic Highlights
- The progression utilizes a D7 tritone substitution of the dominant, creating a pungent chromatic approach to the standard Bbm7-Eb7 ii-V cell.
- Incorporation of the iiø7 (Bbm7b5) provides a subdominant minor coloration that frequently blurs the distinction between Ab major and Ab minor tonalities.
- The Bm7-E7 sequence functions as a chromatic side-slip, momentarily shifting the tonal center up a half-step to create tension before snapping back to the Ab tonic.
- Functional secondary dominants (Ab7sus to Ab7) are employed to destabilize the tonic and drive harmonic momentum toward the IV chord (Dbmaj7).
Improvisation Focus Navigating rapid, non-diatonic ii-V cells using the Ab whole-tone scale and chromatic enclosures to bridge jagged harmonic shifts.
Difficulty Rating 4/5: The erratic harmonic rhythm and abrupt side-slipping modulations require advanced melodic agility and a sophisticated grasp of chromatic voice leading.