Gwaihir, thanks for introducing the invented instrument by Russian Physicist, Lev Sergeyevich Termen (Léon Theremin). Learning or teaching how to play the instrument would be via intuition while it was developed scientifically, I think. The sound of theremin is similar to that of saw music?
30. Theremin: The theremin was originally the product of Soviet government-sponsored research into proximity sensors. The instrument was invented by a young Russian physicist named Lev Sergeyevich Termen (known in the West as Léon Theremin) in October 1920[2][3] after the outbreak of the Russian Civil War. After a lengthy tour of Europe, during which time he demonstrated his invention to packed houses, Theremin moved to the United States, where he patented his invention in 1928.[4] Subsequently, Theremin granted commercial production rights to RCA. Wikipedia
