New York – A theremin is an instrument you have to see to believe. Invented in 1928 by Léon Theremin, it is the only musical instrument that you do not have to touch to play. Instead, its undulating sound is controlled by the user’s hand movements reacting with the electromagnetic field emitted from its antennae. Now, furniture designer François Chambard has created a collection of 12 theremins for an exhibit celebrating music, performance and art.