Music & Acoustics
Harmonic Series
Aₙ = 1/n at fₙ = n·f₀
A vibrating string or air column sounds every integer multiple of its fundamental at once, with the partial amplitudes falling off as 1/n — the recipe that gives each instrument its timbre.
Computed & rendered in pure C# on the frozen OnlyCSharp 1.8 library — animation baked to GIF with the library's own
Gif encoder (no GPU, no ffmpeg, no external packages).