Legendary Texas musician Roky Erickson, who helped invent psychedelic rock in the 1960s with his band the 13th Floor Elevators, died Friday. The cause of death was not immediately known. Erickson was 71. Mikel Erickson, Roky's brother, confirmed the news in a public Facebook post that read: "My brother Roky passed away peaceably today. Please allow us time. Music and laughter forever." "The world lost a huge light and an incredible soul," Sumner Erickson, another brother, said by phone Friday. "It wasn't the easiest life, but he's free of all that now...Late For the Sky Pittsburgh-opoly. Huge Saving