Experimental musical instrument including intonarumori ("intoners" or "noise machines"), to create "noises" for performance. Unfortunately, none of his original intonarumori survived World War II. Replicas are being made though. Léon Theremin was a Russian inventor, most famous for his invention of the theremin around 1919–1920, one of the first electronic musical instruments. The Ondes Martenot is another early example of an electronic musical instrument. The luthéal is a type of prepared piano created by George Cloetens in the late 1890s and used by Maurice Ravel in his "Tzigane" for luthéal and violin. The instrument can produce sounds like a guitar or a harmonica,
Pena (musical instrument) Pena (musical instrument) ꯄꯦꯅꯥ(Pena) , also known as "Tingtelia" in Tangkhul Language is a mono string instrument falling in the lute category, similar to some of the traditional Indian stringed musical instruments such as Ravanahatha, "Ubo" or the "Kenda", found in various parts of the country. It is the traditional music instrument of the Meetei community of Manipur, India and some parts of Bangladesh and is played either solo or in group, in folk music or as the accompanying musical instrument for Lai Haraoba festivals. Pena playing is becoming a dying art as only 145 active Pena players are reported