Together since the ‘60s, the Tower of Power ensemble—led by their vaunted horn section—soar with doo-wop-inspired vocal harmonies and big band jazz-funk. The multiracial Oakland group's working-class origins and social conscience are evident in tracks like the bell-bottom boogie of “What Is Hip,” which questions the meaning of cool, and the hard-driving groove of “Only So Much Oil in the Ground.” They make optimistic, life-affirming “Soul Music with a Capital S” for everyone.