The most prominent of Knoxville-raised Sean Bowie’s numerous noms de plume, Yves Tumor began as a murky sound collagist dwelling in the underbelly of electronic music’s avant-garde depths. Now they’re an extravagant bandleader inching towards alt-pop superstardom, making the sort of impression that has seen them interviewed by the likes of Michèle Lamy, Courtney Love and Kembra Pfahler.