Blumlein and the birth of stereo [biography]

Despite a tragically early end to his career in a wartime air crash, Alan Blumlein remains one of the great engineers of the 20th Century. Among his many achievements was the pioneering work on stereo sound carried out in the 1930s which, as the author describes in this extract from a new biography published by the IEE, was to have a major impact on the development of the recording industry almost 30 years later.