Lou Reed is dead at the age of 71. He’d gotten a liver transplant in Cleveland back in May, but the cause of his death has not been disclosed.

Reed’s wife, Laurie Anderson told the Times of London earlier this year regarding the transplant: “It’s as serious as it gets. He was dying. You don’t get it for fun.”

Below,  Andy Warhol’s “Symphony in Sound,” one of the only known sync sound film recordings of The Velvet Underground: