title: Where can I find a good FFT sample implementation/tutorial?
body: <p>I've been looking everywhere for a sample Fast Fourier Transform implementation/tutorial in (preferably) C#.</p>
  
  <p>However, every one I've found has been poor at explaining what's going on, and/or poorly commented; or they assume that you already know the FFT algorithm, or they're tutorials about how to USE FFTs.</p>
  
  <p>Anyone know of a good sample/tutorial? </p>