Sonic Youth were one of the most unlikely success stories of underground American rock in the '80s. Where contemporaries R.E.M. and Hüsker Dü were fairly conventional in terms of song structure and melody, Sonic Youth began their career by abandoning any pretense of traditional rock & roll conventions. Borrowing heavily from the free-form noise experimentalism of the Velvet Underground and the Stooges, and melding it with a performance art aesthetic borrowed from the New York post-punk avant-garde, Sonic Youth redefined what noise meant within rock & roll. Sonic Youth rarely rocked, though they were inspired directly by hardcore punk, post-punk, and no wave. Instead, their dissonance, feedback, and alternate tunings created a new sonic landscape, one that redefined what rock guitar could do.