Not a joke, a spectrogram is where you split a sound signal into its frequencies and amplitude for each frequency using a Fourier transform. 2D images can be e

Not a joke, a spectrogram is where you split a sound signal into its frequencies and amplitude for each frequency using a Fourier transform. 2D images can be encoded that way, though they usually don't sound like anything significant. My favorite example of hiding an image in a song was in Doom 2016: https://www.youtube.com/watch?v=yzFit0nldf4 https://www.youtube.com/watch?v=yzFit0nldf4