Geoffrey Barnard has been involved with developments in contemporary music and sound art since 1969. Primarily a music historian, he completed a Masters thesis in 2003 on the music of John Cage, Christian Wolff and Cornelius Cardew. During the early 1970s he was a member of the new music organisation AZ Music and the electroacoustic improvisation group Teletopa and continues to be active in improvised music, mostly as a percussionist.