Something to bring us all (way) back to our roots :

The clips can be hear via clicking the link to the whole article.

quote:

A scratchy recording of Baa Baa Black Sheep and a truncated version of In the Mood are thought to be the oldest known recordings of computer generated music. The songs were captured by the BBC in the Autumn of 1951 during a visit to the University of Manchester. The recording has been unveiled as part of the 60th Anniversary of "Baby", the forerunner of all modern computers. The tunes were played on a Ferranti Mark 1 computer, a commercial version of the Baby Machine.

http://news.bbc.co.uk/2/hi/technology/7458479.stm