This CD came as part of my Theremin kit I ordered from Big Briar back in the 90s. Just holding a single note is hard enough on a theremin, Clara Rockmore manages to control the intrument like a violin. These are all classical pieces performed with only a piano as accompanyment. The overall feeling of the music is somber and not at all like the sci-fi buzzing you normally hear from theremin playing.
The Art of the Theremin