I am trying to understand the System Analysis Tool by adding filters to the Pitch. Using white noise and over system I am trying to understand what to expect. The link https://www.dropbox.com/s/nax69zjft1jcfj8/Pitch.JPG?dl=0 shows a plot for the pitch. the gain and phase in (1) are after filtering link to the value https://www.dropbox.com/s/x6fr6nbxfz2grci/Pitch Filters.JPG?dl=0.

Are these normal, has anyone done tutorials on the System Analysis Tool.

Thanks

David Ardis