Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsSemitones in Pythagorean Tuning and 12 Tone Equal Temperamenthttp://demonstrations.wolfram.com/SemitonesInPythagoreanTuningAnd12ToneEqualTemperament/]]>http://demonstrations.wolfram.com/SemitonesInPythagoreanTuningAnd12ToneEqualTemperament/