Pennsylvania-bred rock band Concrete Castles took their name from one of the first songs they ever wrote together, a wildly cathartic anthem called “Thrill.” As frontwoman Audra Miller reveals, the song was inspired by the pure joy that she and her bandmates Matt Yost (guitar) and Sam Gilman (drums) have found in chasing their dreams with no backup plan. The trio possess a profound instinct for the intricacies of song construction, thanks in part to the many years they’ve spent playing in a cover band whose YouTube channel boasts over a million subscribers and a quarter billion views.