In 1957 Max Mathews built the first system for creating computer-generated sound at Bell Laboratories. The first concert of computer-generated music was held in 1958. Among the composers associated with computer music are Iannis Xenakis, Charles Dodge, and John Chowning. Recordings of early computer-generated music are available through the Computer Music Series on Wergo Records and the CDCM Computer Music Series on Centaur Records.