Have you ever tried to play a violin? It’s crazy hard. There are no frets on the fingerboard, so you have nothing except your ear to tell you whether you are putting your fingers in the proper places. Meanwhile, your other hand is sawing the taught, stretched horsehairs of a violin bow across those very same strings. Horrible, shrieking noises ensue for the first few weeks, or months, or—sometimes—years. The closest thing to that sound I can think of might be something like what would occur if a high-pitched dentist drill was being applied to the teeth of a cat in heat.