 Lydia Kavina is universally recognised as being the greatest virtuoso of the Theremin in the world.The niece of one of Lev Termen's first-degree cousins, Kavina began studying the Theremin under the direction of Termen himself when she was nine years old.Five years later, she was ready to give her first Theremin concert, which marked the beginning of a musical career that has so far led to more than 500 theatre, radio and television performances throughout the world.