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The BBC has an early video clip from EMI research engineer Alan Blumlein, who made a series of stereo recordings in the early 1930s after filing a patent for binaural sound technology. Blumlein early recordings include a stereo capture of the London Philharmonic rehearsing Mozart's Jupiter Symphony in 1934. The recordings have been digitally cleaned up to remove the aging effects of the 78 RPM phonographs on which they were stored. Blumlein was a prolific inventor, awarded 128 patents over the course of his life for everything from stereo phonographs to TV to reconnaissance radar.