Blood Run, its first studio album in six years, opens with the sort of beeps that usually announce something heavy backing up, but Unsane is not moving in reverse. The revitalized group runs through a gloomy gauntlet, ranging from slow-building cement-shoe stomps to propulsive percussion-driven rockers. The noise-band movement Unsane pioneered in the late '80s now boasts a voluminous roster, but these trailblazers still scorch the path with more intensity than their acolytes.