On Fri, 25 Jun 2004 10:48:38 -0400 allenre wrote: > The page says that 'purple noise' is differentiated white noise, but if white > noise has a distribution of 1, then differentiating it gives you 0 (silence). Um, you're assuming that 'differentiating the noise' and 'differentiating its distribution' is the same thing... ;-) Christian