Rock · Pop · IndieBb (decoy) → C · the vamp was never home
b7 → 4 (the decoy) ‖ 1 (the reveal)
Vamp b7 and 4 long enough and the ear crowns the first chord king. Then the real tonic lands a whole step above it and retroactively demotes the whole intro. Modulation by plot twist — theorists call the payoff an emergent tonic, the real key deliberately withheld for the reveal.
hear it in “She's Gone” (Hall & Oates) — tonic withheld till the chorus
Lead-in — how players set it upOpen the song ON the vamp — the decoy only works cold.Or salt the decoy — one out-of-place chord hints the vamp is lying.Or run the decoy under a melody that secretly outlines real 1.Follow — where it usually goesOnce real 1 lands, never let the vamp be heard the old way again.Reuse the old vamp inside the real key — now it's just b7 and 4.Or invert the trick at the bridge: make real 1 vanish again.
Withhold the melodic tonic too — circle around the decoy's notes and only land the real 1 when the chorus finally names it.Target tones (in C)Bb — lean on D (3)F — lean on A (3)Bb — lean on D (3)C — lean on E (3)G7 — lean on B (3) · F (b7)C — lean on E (3)Half-step wiresBb ↘ A · A → Bb · F ↘ E · C ↘ B · E → F · B → CAcross the borderhold these into C: C · E · G