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Larry Hardesty's avatar

The diabolus in musica — the devil in music, or, sometimes, the devil's interval or devil's chord — is actually the augmented fourth or flatted fifth — the tritone.

Seth Lorinczi's avatar

Shoulda paid more attention, clearly….

Larry Hardesty's avatar

To whom, when?

I do think that emergency sirens in some parts of Europe — I'm pretty sure France is one of them — are tuned to tritones, because it's such an uncomfortable sound.