b2⁷ shares its tritone (3 and b7) with 5⁷, so it resolves to 1 just as hard — but the bass slides down by half step instead of leaping. Swap it in anywhere a 5⁷ lives.
hear it in “The Girl from Ipanema” — the famous b2⁷
Lead-in — how players set it upSwap it in wherever 5⁷ was booked — 2- sets it up perfectly.From 6-⁷ for the long chromatic lane: 6, 2, b2, 1.Or straight off 1Δ7 — the sub as pure color, no setup.Follow — where it usually goesChromatic bass 2 → b2 → 1 completes itself.Resolve to 1⁶ for the classic smooth landing.Or don't resolve — treat b2⁷ as new 5⁷ and relocate.
Over the b2⁷, the home key's 4 and b2 are chord tones — play the ii–V line you know, it still fits, then land on 3.Target tones (in C)Dm7 — lean on F (b3) · C (b7)Db7 — lean on F (3) · B (b7)Cmaj7 — lean on E (3) · B (7)Half-step wiresD ↘ Db · A ↘ Ab · Db ↘ C · F ↘ E