Everyone knows the sounds of Halloween: creaky floorboards, howling winds, the amplified sound of a beating heart. But back in the day, the devil was said to exist in a particular musical tone. For ...

Black Sabbath performs during their Heaven and Hell tour in 1980. The band helped revive the long-feared “Devil’s interval”—a dissonant sound once shunned by medieval choirs—as the backbone of heavy ...

There's a lot of talk about censorship and the stifling of free speech and expression these days. This, however, is nothing ...