Chord Distribution Analysis
| Chord Symbol | Count | Frequency |
|---|---|---|
| F7sus | 5 | 16.7% |
| Bbmaj7 | 4 | 13.3% |
| Dm7 | 4 | 13.3% |
| Cm7 | 3 | 10.0% |
| Gm7 | 3 | 10.0% |
| Bb07 | 2 | 6.7% |
| Em7b5 | 2 | 6.7% |
| Eb7 | 2 | 6.7% |
Key Patterns Detected
| Pattern | Function | Frequency |
|---|---|---|
| Bbmaj7 -> F7sus | Setup (Major Key) | 2 |
| Cm7 -> F7sus | Setup (Major Key) | 2 |
| F7sus -> Bbmaj7 | Resolution (Major) | 1 |
| Dm7 -> G7 | Setup (Major Key) | 1 |
| G7 -> Cm7 | Resolution (Minor) | 1 |
| Gm7 -> C7#11 | Setup (Major Key) | 1 |
Harmonic Highlights:
- Standard diatonic ii-V-I progressions are frequently extended through iii-VI-ii-V-I cycles (Dm7-G7-Cm7-F7sus), maintaining a strong Bb major tonality while adding forward motion.
- The Em7b5-Eb7-Dm7 sequence is a signature Bacharach device, functioning as a sophisticated iiø7-bII7 (tritone substitute for A7) resolving to the iii chord of Bb major.
- Repeated use of F7sus delays dominant resolution, creating a distinctive floating, expectant harmonic texture before returning to Bbmaj7.
- The “Bb07” (interpreted as Bbdim7) briefly introduces chromatic tension, likely serving as a passing diminished chord before the tonic.
Improvisation Focus: Targeting chord tones and characteristic extensions over altered dominants and tritone substitutions, especially the bII7 chord.
Difficulty Rating: 4 (Intermediate-Advanced). It demands proficient navigation of sophisticated non-diatonic progressions, altered dominants, and tritone substitutions, moving beyond simple diatonic improvisation.