CSIRAC, the first computer to play music, did so publicly in August 1951 (reference 12).
One of the first large-scale public demonstrations of computer music was a pre-recorded national radio broadcast on the NBC radio network programMonitor on February 10, 1962. In 1961, LaFarr Stuart programmed Iowa State University's CYCLONE computer (a derivative of the Illiac) to play simple, recognizable tunes through an amplified speaker that had been attached to the system originally for administrative and diagnostic purposes.
An interview with Mr. Stuart accompanied his computer music.
The late 1950s, 1960s and 1970s also saw the development of large mainframe computer synthesis.
Starting in 1957, Max Mathews of Bell Labs developed the MUSIC programs, culminating in MUSIC V, a direct digital synthesis language