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Cutting-edge sounds: what is classical music's iPhone 5?
5. Ondes Martenot
As the demand and interest for electric instruments grew, the Ondes Martenot emerged in the 1920s. Invented by Maurice Martenot, it emits a wispy, oscillating sound that was favoured by Darius Milhaud. Recently, it's been championed by Jonny Greenwood of Radiohead in the band's compositions.