[Dead-Air]

That'd be:

Hans Grusel's Krankenkabinet - "Moog System 15 Variation One" - Happy As Pitch - C.I.P.

http://www.hansgrusel.com/

A photo I shot of their set at the 13th Annual Olympia Experimental Music Festival:

 

I'm guessing the "old song" you refer to is this:

Clara Rockmore - "Saint-Saens: The Swan" - The Art of the Theremin - Delos International

http://en.wikipedia.org/wiki/Clara_Rockmore