Earliest known recording of computer-generated music in Alan Turing’s Computing Machine Laboratory in Manchester 1951 on the Ferranti Mark 1.
“The story began with Christopher Strachey got hold of a copy of Turing’s Programmers’ Handbook for Manchester Electronic Computer Mark II (the Mark II computer had replaced the prototype Mark I, which also played notes, early in 1951). This was in fact the world’s first computer programming manual. Strachey, a talented pianist, studied the Handbook and appreciated the potential of Turing’s terse directions on how to program musical notes. Soon to become one of Britain’s top computer scientists, Strachey turned up at Turing’s Manchester lab with what was at the time the longest computer program ever to be attempted.” [*]