The half-diminished applied chord: same leading-tone bass as the #4 dim7, but one interior note relaxes, and the pull turns from urgent to wistful. Classical writers reach for viiø7 of V when they want the arrival at 5 to feel inevitable rather than dramatic.
hear it in Romantic-era approaches to the dominant
Lead-in — how players set it upFrom 2-⁷ — predominant into the velvet leading tone.Or from 4 — subdominant hands to the velvet pull.Or from 6-⁷, the lane detouring through soft chrome.Follow — where it usually goes5 can act (5⁷ → 1) or hang as a half cadence.Or harden it on repeat — ø7 first pass, dim7 the second.Promote 5 to a full cadence when the phrase ends.
Velvet, not leather: hold the key's 3 on top (the ø7's softest tone) and let the bass do the leaning into 5.Target tones (in C)C — lean on E (3)F#m7♭5 — lean on A (b3) · E (b7)G — lean on B (3)Half-step wiresG ↘ F# · F# → G · C ↘ B