Introduction - If you have any usage issues, please Google them yourself
FFT GUI
The FFT is a complicated algorithm, and its details are usually left to those that specialize in such things. This section describes the general operation of the FFT, but skirts a key issue: the use of complex numbers. If you have a background in complex mathematics, you can read between the lines to understand the true nature of the algorithm. Don t worry if the details elude you few scientists and engineers that use the FFT could write the program from scratch.