Intersting! interactive demos : http://www.exploratorium.edu/exhibits/highest_note/ex.about.fr.html -Qua Original Message: ----------------- From: Daryl Shawn highhorse@mhorse.com Date: Tue, 06 Nov 2007 14:36:10 -0600 To: Loopers-Delight@loopers-delight.com Subject: Shepard tone 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 -------------------------------------------------------------------- mail2web.com – Enhanced email for the mobile individual based on Microsoft® Exchange - http://link.mail2web.com/Personal/EnhancedEmail