The Nerd's Tenor
The theremin is one of those instruments that's generally a lot more fun to play than to listen to. But this performance is inspired listening. He's got a gizmo called an Electro Harmonix Stereo Talking Machine that applies a vocal formant to the theremin's audio signal, which in this case makes it sound like a human voice singing "ah". It gives a wonderful sound, but mad props to the musician, Peter Pringle! Controlling a theremin is the instrumental equivalent of wrestling a greased monkey. His ability to control pitch, volume, and vibrato so precisely and expressively is downright astonishing. Also, the retro film look on the video is a great touch!