Hmmm, tried both Juho?s suggestion and the "theremos" but they both sound to nice and clean. The real thing has a more harsh or raw sound if you can call it that. I did a recording of both and when zooming to the waveforms you can see that the theremin is not a pure sine wave. Have a listen:
Pure wave from the virus:
http://hjem.get2net.dk/revolution/thermio.mp3
The real thing:
http://hjem.get2net.dk/revolution/theremin.mp3
Sorry about the poor audio quality
