Few sounds in rock are more loaded with promise than the shrill feedback drone that precedes every Eyehategod gig. The New Orleans sludge-metal group started 27 years ago as a bad joke and slowly evolved into an institution, amassing a global following and even turning up on Treme. Here, the masterful riff wranglers, soldiering on after the 2013 death of longtime drummer Joey LaCaze, turn up in support of their fine 2014 self-titled comeback LP. Join the faithful; embrace the din. Mortals, Blackout and Scowl open Feb 6; Full of Hell, Cleanteeth and Clamfight set the stage Feb 7.