How to Use This FFT Demo

1. Build your signal: Use the Expression field below or click the function/operator buttons to insert common components.
2. Set sampling parameters: Adjust Sampling Rate, Duration, and Number of Samples to control resolution and length.
3. Compute FFT: Click Compute FFT to get both magnitude and phase spectra.
4. Interpret results: The Magnitude Spectrum shows amplitude vs. frequency; the Phase Spectrum shows angle vs. frequency.