Every musical note is a sum of sine waves at integer multiples of the fundamental frequency. The mix of harmonics defines the timbre — why a violin and flute playing the same note sound different.
The Fourier theorem guarantees any periodic waveform can be decomposed into harmonics. Drag the sliders to sculpt timbre. Odd harmonics only → square/clarinet; all harmonics decreasing → sawtooth; odd harmonics 1/n² → triangle.
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