The buzz is definitely out on the Burnside Exploration. As the name suggests, the band is composed of the late blues man R.L. Burnside’s kin—his son, guitarist/vocalist Garry, 30, and his 28-year-old grandson, drummer/vocalist Cedric Burnside. The Exploration made its New Orleans debut last spring at d.b.a. and the duo continues to gain fans for its dynami...