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AM Radio Modulation
v(t) = (1 + m·cos ω_m t)·cos ω_c t
Amplitude modulation stamps the audio onto the amplitude of a high-frequency carrier — the receiver just tracks the envelope to recover the sound.
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).