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The Fourier transform decomposes any signal into its constituent sinusoidal frequencies, making it one of the most powerful tools in mathematics, physics, and engineering. This visualizer starts with a time-domain waveform—square, sawtooth, or one you draw—and decomposes it into its frequency spectrum, animating each harmonic as a rotating phasor. You can build signals by adding sine waves of chosen amplitudes and frequencies and instantly see the resulting waveform, developing a concrete understanding of superposition and the relationship between time and frequency domains.
Fourier transform · frequency spectrum · harmonic analysis · DFT · phasor · signal decomposition
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