OK nerds, if you're a fan of Sheldon Cooper (Big Bang Theory) you may find this interesting. Reverb.com has a "Gear History" article on the theremin- a touchless instrument of the early days (1940s ?) of sine wave manipulation to create music. It's nerdy interesting... https://reverb.com/news/the-theremins-century "Playing the Theremin is a little like playing the violin," says Martin, "in that it's essentially an endless fretless neck with an infinity bow. You can hold a note as long as you want, but you have to find the position where that note is. The problem with the Theremin was that since you didn't touch it, it was almost impossible to play. Anyone can make noise on a Theremin. To make music on a Theremin is something else." Here is a 1945 concerto using a theremin to mimic a violin... This will not be everyone's cup of tea, but maybe a few of you will find it interesting, as I did.