Shepard tone

[Daryl Shawn <highhorse@mhorse.com>]

Perhaps most people are familiar with this, but this blows my mind...a 
"Shepard tone", created of a particular combination of sine waves, which 
makes it seem as if the tone is continuously descending without ever 
reaching bottom. A loop that simply repeats, while only APPEARING to 
evolve...awesome.

here's a direct link to a nicely done clip on Wikipedia:
http://upload.wikimedia.org/wikipedia/commons/6/61/DescenteInfinie.ogg

Also thanks to all who responded to the square wave modulation question, 
very interesting stuff. Makes me wanna get one of them old Lexicons.

Daryl Shawn
www.swanwelder.com
www.chinapaintingmusic.com