Fast Fourier transform

Fast Fourier Transform (FFT) is a way of changing a signal from one form to another. It basically takes a signal, like sound or light, and changes it into a different form, like a frequency or a waveform. This makes it easier to understand the signal and do things with it, like analyze it or improve it. FFT is super helpful because it can take a complicated signal, break it down into simpler pieces, and then put it back together.