Raise the 5th of the tonic and it becomes a leading tone into the 3rd of the 4 chord. Same engine as 1⁷ → 4, but the voice that moves is on top. Also try 5+ → 1 for the vintage turnaround.
hear it in “Oh! Darling” opening chord · doo-wop intros
Lead-in — how players set it upFrom plain 1; the #5 emerges as a raised voice, not a new chord.From 5 — its top voice hands the baton to the rising #5.Or start the full line cliché: the aug is step two of four.Follow — where it usually goes4 receives the push — brighten it or sour it.After 4, borrow 4- and complete the bittersweet arc.Or run the vintage turnaround: 5+ leaning into 1.
Follow the raised 5 upward: 5, ♯5, 6 — a three-note melody that IS the progression.Target tones (in C)C — lean on E (3)C+ — lean on E (3)F — lean on A (3)Half-step wiresG → G# · E → F · G# → A