I saw this instrument on The Big Bang Theory.
http://en.wikipedia.org/wiki/Theremin
It makes sound by detecting radio wave interference. To my knowledge the one hand controls the volume using the looped receiver and the other hand controls the pitch using the straight receiver.
[video=youtube;7XQN9XDnRm4]http://www.youtube.com/watch?v=7XQN9XDnRm4[/video]
http://en.wikipedia.org/wiki/Theremin
It makes sound by detecting radio wave interference. To my knowledge the one hand controls the volume using the looped receiver and the other hand controls the pitch using the straight receiver.
[video=youtube;7XQN9XDnRm4]http://www.youtube.com/watch?v=7XQN9XDnRm4[/video]