Home Electronics & Media
Sampling & Aliasing (Nyquist Fold)
f_alias = |f − f_s·round(f/f_s)|
Digitize a signal above half the sample rate and it folds back to a false low frequency — the aliasing an audio ADC or camera must filter out, drawn as the tell-tale Nyquist zig-zag (f_s = 40 kHz).
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).