For anyone who truly wishes to learn the DTE I suggest reading Real World Bryce. It explais in detail the formulas, and buttons. As for the noise phase, it's only useful in some situations. If you are talking about the noise filter, bring up the filter then click the little green corner in the upper left (works on noise phase too). Then you'll see a whole bunch of options to use. If you don't know about the DTE and what things do you are going to have a very frustrating time getting what you want out of it.