Benjamin Booker’s sound is tougher to pin down than it used to be. His first, self-titled album was a high-powered gut punch, 44 minutes of harsh, low-fi blues punk that blew the world away with its raw explosiveness. His latest project, Witness, which came out in June, is a different animal entirely. It’s tamer in terms of unchecked energy, but sonically, it’s much more adventurous. Booker is bringing his new songs to Voodoo, where he’ll play the South Course stage at 6 p.m. Friday.