Diabolus

Also known as the Devil’s interval or diabolus in musica, the tritone is a dissonant combination of tones that creates a sense of tension, ambiguity and instability, says Neil Lerner, a musicologist who studies music in film and television and teaches at Davidson College.

As late as the seventeen-hundreds, the tritone—a dissonant interval of two notes, three whole steps apart—was reviled as diabolus in musica: the devil in music.

His deputy called him diabolus bibliothecae, “the devil of the library”; others referred to him simply as Old Nick.

Originally the site had been called Diabolus Market, a “peaceful, simple and professionally run service with an expert development team” focusing solely on selling marijuana online.

However, he experienced the occasional dip in quality, notably with the 1998 album Diabolus in Musica.