[Dixielandjazz] The Shepard Tone Illusion

[andy.ling at quantel.com]

This is an interesting audio illusion

http://www.open.ac.uk/openlearn/science-maths-technology/science/physics-and-astronomy/physics/auditory-illusion-the-shepard-tone

or for a video about how it works

http://www.bbc.co.uk/programmes/p00gfdg1

Enjoy

Andy Ling



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