Long before the wonders of keyboard cat, felines and music had a tense relationship. The two were tied by an infernal instrument—the katzenklavier, or cat organ.

Imagine a row of eight cats tightly packed in individual cages, wedged along a keyboard. Their tails are pinned down and pulled taut. With the touch of a key, a mechanism slams a nail down into the cat’s tail. So when a keyboardist plays a tune, the cats—which are arranged according to the pitches of their meows—yowl together in pain, crying out in musical harmony.

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Animal abuse