ondes martenot

World English Dictionary
ondes Martenot (ɔ̃d mɑːtəˈnəʊ)
 
n
music an electronic keyboard instrument in which the frequency of an oscillator is varied to produce separate musical notes
 
[C20: French, literally: Martenot waves, invented by Maurice Martenot (1898--1980)]

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Encyclopedia Britannica
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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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