About Clara Rockmore
Clara Reisenberg Rockmore (née Reisenberg; 9 March 1911 – 10 May 1998) was a Litvak classical violin prodigy and a virtuoso performer of the theremin, an electronic musical instrument. She was the sister of pianist Nadia Reisenberg. She also discovered that she could achieve a steadier tone and control the vibrato by keeping the tips of her right-hand thumb and forefinger in contact. Rockmore made orchestral appearances in New York and Philadelphia and went on coast-to-coast tours with Paul Robeson, but it was not until 1977 that she released a commercial recording called The Art of the Theremin.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.