Over the course of eight full-length albums and nearly 20 years as a band, Trivium has strayed from the straight-ahead metalcore of its early days. Some fans may have written the band off like bad debt, but plenty stayed along for the ride as it veered into a more accessible sound. And recent album sales suggest plenty of new ones were happy to jump on board. Truth is, accessibility isn’t a terrible thing if it means writing better songs and stretching at the boundaries of extreme metal. And on last year’s lauded The Sin and the Sentence, Trivium did both. The band still traffics in whiplash tempos, life-is-pain screams and surgically precise riffing, but it also benefits from melody and nuance. Singer Matt Heafy’s clean vocals have a confidence and maturity that prevent them from sounding like a cut-and-paste afterthought — something a lot of other metal bands could learn from. If nothing else, it should be fun to see these guys execute some of the most challenging material of their career live.