Hüsker Dü's music became more accomplished and melodic over time. By late 1982, Hart's drumming "rushed the music along more precisely than ever" and he and Mould, who traded vocal duties, were singing more tunefully. While Mould was the band's primary songwriter, Hart began writing more songs. Hart wrote two songs for 1983's "Metal Circus" EP, the "perversely sing-along" "Diane" and the "impassioned speed-pop gem" "It's Not Funny Anymore." Hüsker Dü's more melodic take on hardcore struck a chord with college students, and various tracks from "Metal Circus", particularly Hart's "Diane," were put into rotation by dozens of campus radio stations across the US. Hart was tagged by observers as the "hippie" of the group due to his long hair and his propensity to drum with bare feet; biographer Michael Azerrad additionally noted that "the wide-eyed sincerity of his songs was far more San Francisco '67 than New York City '77," which contrasted with Mould's "incisively bitter" songs.