Ah, yes! Takes me back to my short-wave listening days in the early/mid 80s. Deeply creepy-sounding they were too, late at night in the dark with the headphones on. They seemed to be emanating from an alien world.

Mind you, I reckon that first clip is just an early demo by Kraftwerk (see http://www.youtube.com/watch?v=7zFEFtYBD_U ) :-)

Nigel