If you can get hold of a copy, I recommend the April 2008 issue of Sound on Sound, which includes Steve Marshall's epic 12 page history of the BBC Radiophonic Workshop, which was founded 50 years ago in April 1958.
His piece is full of goodness, but the thing that really amazed me was this "We have also sound-houses" quote from Francis Bacon's 1626 book 'The New Atlantis', which Workshop founder Daphne Oram had pinned on the wall of the Workshop. It's all there: "We represent small sounds as great and
deep" = Waves Ultramaximiser, "We represent and imitate all articulate sounds and letters" = a circuit-bend Speak'n'Spell, and "divers tremblings and warblings of sounds" pretty well describes my entire musical output.
The Tone Generation is a ten part series of podcasts about the earliest days of electronic music. Part One [mp3 link] covers Britain - with rare recordings from the 1950s and '60s by people like Tristram Cary, Daphne Oram, and assorted Radiophonic Workshop alumni. The music on offer is all pretty challenging - lots of atonal bleeps and waves of noise and very different from the commercially-minded output of Raymond Scott, who was working at the same time - although with more expensive gear. The podcast is presented by Ian Helliwell, and produced by Simon James, who also did the splendid Welcome to Mars.