London-based trio South debuted two years ago with the album “From Here on In,” which seamlessly merged rock, dance/electronic and pop. In the ensuing months, South toured non-stop. If the sweeping “With the Tides” is any indication, performing live increased the band’s confidence to pump up the rock wattage. The result is a richly textured musical landscape. A banjo and harpsichord sweeten “Loosen Your Hold,” while a harp and cello soften “9 Lives.” Elsewhere, Manic Street Preachers-like harmonies can be heard in “Silver Sun” (album producer Dave Eringa has worked with the Preachers). The key to South’s epic sound is its merging of orchestral maneuvers and traditional rock elements.—MP