The Fourier Transform · Sound
Every signal is a sum of sine waves
You are hearing the same partial Fourier sum the visual explorer draws — each harmonic is a real sine oscillator running through WebAudio. Add harmonics, swap targets, or drag individual amplitudes to sculpt the timbre in real time.
In Auto, partials k > 8 follow the target wave's recipe. In Custom, partials k > 8 are silenced — you are sculpting the first eight.