As a Thereminist, I can say that this musical instrument is not an easy
instrument to play -- It is downright difficult!  So far, not one person
I know can come close to playing it even with my instruction!  One must
remain perfectly motionless other than movement from the hands and arms.
Metal objects near the Theremin will alter pitch drastically.

The most difficult thing about a playing a Theremin is that you have no
reference point.  If there is a rest in the music, and one has to start
on a different, note ... well, it is there, and your judgment and
experience is the only way to find it.

The loudspeaker for the tone or pitch is usually behind the performer.
This gives the performer a slight advantage in that the volume of a
pitch, can be made so low that the audience hopefully cannot hear it.
Once the correct pitch is found, and it has to be done swiftly, the
volume can be brought up.  Anyone coming within a few feet of the
performer while the instrument is being played will ruin a performance.

If anyone is interested in purchasing a new Theremin, they are available!
You might try checking some of the web sites on Theremin.

Bruce Clark

 [ Besides Theremin, search also for performer Clara Rockmore.  -- Robbie