Echoes of Silence is the third mixtape by the Canadian singer and songwriter the Weeknd, released on December 21, 2011, by XO. Like his debut mixtape House of Balloons and his second mixtape Thursday, the Weeknd collaborated with musician Illangelo; who produced the majority of the project. The project also featured first-time collaborations with producers Clams Casino and DropXLife and a spoken-word interlude from rapper Juicy J. Lyrically, Echoes of Silence contains similar themes to the Weeknd's previous projects, exploring his drug use and experiences with love.