Oh lordy lordy. Do you actually know WTF you are talking about? Do you know what passband means? I could explain this to you (because other readers will benefit), but at this point, I really do not want to. HINT: frequency domain. Let's just stop while you are behind. You guys are bordering on magickal / alchemical beliefs masquerading as science because of the use of cool words like Nyquist and reconstruction. I don't where the heck you guys learned or made up your stuff; but it most certainly is not grounded in the math.