the embedded spectrogram hidden at the end of Aphex Twin's track 'Formula'. it was originally discovered by an avid fan in the early 2000s after the specific audio segment piqued his curiosity upon hearing it. the resulting image wasn't adequately rendered, however, notably due to Richard's inclination to implement advanced technologies and experimentations in his works—so, to put closure to speculation, the distorted face in question was ultimately ruled out to simply be some demonic entity.
shortly after word swept the forums, a different devotee wanted to check if his album's disc also contained this same visual phenomenon. assuming he happened to utilize the same software as Richard, known as Metasynth, his resulting image was essentially the same as what's shown in this video. without a doubt: the insidious grin. — he's inserted spectrograms into a few other tracks since, establishing them as one of his innumerable easter eggs over these past decades.
