Any group that brings together Cyril Neville (of The Neville Brothers), Devon Allman (son of Gregg Allman), and Mike Zito (a rising blues guitar hero) definitely merits interest from fans of Southern rock and New Orleans music. Royal Southern Brotherhood goes beyond the expected to create a supple yet gritty sound laced with an expansive jam-band spirit. After some 40 years in the business, Neville could play the elder statesman here. Instead, he gets down and funky on “Sweet Jelly Roll” and fills “New Horizons” with passionate idealism. Allman does his family name proud with the yearning ballad “Left My Heart in Memphis,” not to mention his tender-to-fiery guitar work throughout the album. Zito’s searing licks further enrich the tracks, as does his tender tune “Ways About You." Bassist Charlie Wooton and drummer Yonrico Scott provide expert rhythmic support, whether the grooves have a reggae tinge (“Fire on the Mountain”), veer into ‘70s hard rock (“Keep on Rockin’”), or open up for an extended instrumental workout (“Brotherhood”).