Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsSounds from Amplitude and Frequencyhttp://demonstrations.wolfram.com/SoundsFromAmplitudeAndFrequency/]]>http://demonstrations.wolfram.com/SoundsFromAmplitudeAndFrequency/