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81.25Level 8 — C major + D♭ major
Analyze D♭ major over C:
D♭ = ♭9
F = 11
A♭ = ♭13.
If C major's E remains below:
you have:
3 + 11
and:
root + ♭9
strong friction.
This is powerful dominant-like tension despite C bass.