How does the wind organ in this youtube video work?

AI Thread Summary
The wind organ's sound production is based on the principle that the frequency of the notes is determined by the harmonics, represented by the integer values of n in the equation f=nv/2L. The velocity of sound remains constant, but the changing air flow affects the harmonics produced. As the air speed varies, it alters the integer values of n, resulting in different musical notes. This relationship explains how the organ generates a range of sounds. Understanding these principles is key to grasping the mechanics behind the wind organ's operation.
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http://www.youtube.com/watch?v=AuYFcjBmMJ0&feature=relmfu

at time 34:35. He says it depends on how fast the air is flowing by? So does that mean the velocity of sound in the equation f=nv/2L change? How are the different sounds produced?
 
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It's not the velocity of sound that's changing, its n that is changing in the equation f=nv/2L. The different notes are different harmonics, corresponding to different integer values of n.
 

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