Page last updated at 17:44 GMT, Friday, 1 August 2008 18:44 UK

Inventor of stereo recordings

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Unique recordings by the inventor of stereo, Alan Blumlein have been 're-mastered' so they can be heard properly for the first time.

This is a film Blumlein made to illustrate stereo. He is the second person to walk across the set (in a suit, wearing glasses).

The BBC Website does not broadcast sound in stereo.

The Man Who Invented Stereo was broadcast on Radio 4 at 20:00 on Saturday 2 August and can be accessed until Saturday 9 August via the BBC iPlayer.

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