There are brother-sister duos that don’t have much more going for them than the sibling angle, and there are those that have the sort of blood-born musical empathy that makes a genuine difference to the music. The Breedings? They fall into the latter category. Willie Breeding tried the solo thing first, before realizing his older sister Erin’s husky pipes were just the right instrument to get his roots-pop songs across. Then they moved here together and quietly released a very fine debut album last year: Laughing at Luck. Allen Thompson apparently had a similar epiphany, and he’s gone from loner troubadour to bandleader with his new album Salvation in the Ground. The result is a more muscular take on ’70s-style West Coast country-rock. While it’s still just Sam Lewis — not the Sam Lewis Band or Sam the Band (somebody beat him to that last one) — Lewis has found an essential musical foil in Kenny Vaughan, with whose trio he’s been sharing the bill throughout the mid-South. It’s been many decades since Tony Joe White broke through with his funky swamp storytelling, but here’s hoping Lewis has similar success with his supple country-soul narratives.