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ondes Martenot

/ɔ̃d mɑːtəˈnəʊ/
(music) an electronic keyboard instrument in which the frequency of an oscillator is varied to produce separate musical notes
Word Origin
C20: French, literally: Martenot waves, invented by Maurice Martenot (1898–1980)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Encyclopedia Article for ondes martenot

(French: "musical waves"), electronic musical instrument demonstrated in 1928 in France by the inventor Maurice Martenot. Oscillating radio tubes produce electric pulses at two supersonic sound-wave frequencies. They in turn produce a lower frequency within audible range that is equal to the difference in their rates of vibration and that is amplified and converted into sound by a loudspeaker. Many timbres, or tone colours, can be created by filtering out upper harmonics, or component tones, of the audible notes.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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