Underoath celebrates the 20th anniversary of Define the Great Line at ACL Live at The Moody Theater in Austin, with August Burns Red, Atreyu and Emery on the bill. The lineup brings several strands of heavy music together for fans who appreciate both abrasive intensity and melody. Give yourself the whole evening to hear the supporting acts rather than treating this as a headliner-only stop. The show starts at 6:30 p.m., so make an early dinner part of the plan and bring your concert ticket.