This code is based on a filter designed with below filter coefficients. The FFT on a real signal (w/o imaginary elements) is perfectly symmetric. Real signal = The abs value of FFT It also could be ...

I didn't understand any of the Fast Fourier transforms (FFTs). This meant I had to use other people's FFTs and they were not as I wished them to be. I just wanted a simple FFT that I could modify as I ...