SIGNALS · SAMPLING · FOURIER ANALYSIS
Signals and Spectra: FFT Playground
A hands-on FFT experiment about sampling rate, frequency resolution, spectral leakage, and aliasing.
Try the experimentVISUAL LABS
Explore by changing a variable.
Small, self-contained experiments for technical ideas. Change a parameter, inspect the computed result, then read the assumptions and limits behind it.
Visual Labs are currently available in English only. The Korean and Japanese FFT articles remain available.
Available experiments
The lab is intentionally separate from the preserved FFT derivation. It focuses on sampling behavior; the older article remains the place for the DFT proof and radix-2 butterfly derivation.