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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