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Composerism on Instagram: "This is rare footage of Maurice Martenot introducing his new instrument, the Ondes Martenot, in 1928. The theremin was not the only instrument to emerge from DIY tinkering in the early 20th century. Young Parisian radio operator Maurice Martenot—a cellist himself—began work on his Ondes Musicales, later known as the Ondes Martenot, around 1923. Coincidentally, the heterodyne principle—that is, the combination of two frequencies to produce a new one—was the method of so

Ginette - DIY instrument based on the ondes Martenot