Violet aka purple noise power density increases 6 db per octave with increasing frequency over the frequency range. It is also known as differentiated white noise, due to its being the result of the differentiation of a white noise signal. I created this by looping http://en. Wikipedia. Org/wiki/file:purple_noise. Ogg. Which is copylefted, however i claim that they can't be protected based on http://en. Wikipedia. Org/wiki/threshold_of_originality (check language sidebar on wikipedia page for other jurisdictions).
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