[music-dsp] A non-linear audio effect- does anyone know anything about this?

[Svante Stadler]

>http://www.wired.com/news/technology/0,1282,50483,00.html

This sounds really interesting! I had to look in my calendar, I thought this 
might be April 1st - nope that's tomorrow...

>I can't imagine the efficiency would be too high- what conversion
>could you possibly get from ultrasound to audible frequencies ?

Well, air certainly is a non-linear medium, and the acoustical effect needed 
to reach the threshold of pain is what? A couple of milliWatts! Also, most 
hifi equipment have efficiencies of less than 1%.

They specify distorsion of ~1%, which is okay I guess. But I'm guessing the 
frequency response is far from flat. Only guessing though, I know nothing of 
this stuff.

Svante


_________________________________________________________________