What a long strange trip it’s been for Mission of Burma. It bears repeating that the Boston band broke up two decades ago. It also bears repeating that they broke up because of singer/guitarist Roger Miller's ever-growing tinnitus. Or, more bluntly: The band rocked so hard, and so loud, that they destroyed their own hearing. And then got back together. And have since made four awesome albums, ‘Unsound’ being the latest.