Unlike other future virtuosos, Grégoire Blanc didn’t take up his instrument after hearing a symphony, eyeing a glossy magazine, or catching The Beatles on Ed Sullivan. Blanc’s path to musical prowess went through science class. It was there that a teenage Blanc, now 24, learned about a curious contraption called the theremin. Consisting of two antennae, arranged perpendicular to each other, the theremin makes music out of inaudible sound waves traveling between the two poles, with the player touching only air—no strings, keys, or frets to be found. Invented 100…
