9. Singing Saw
The singing saw is a standard saw like the kind that lumberjacks use, which is often smoothed down and played with a cello bow. One end is held between the feet and the other by one hand. As the saw is bowed, it’s bent to change the pitch, and sounds similar to the theremin, especially when vibrato is used by shaking the bending hand slightly. Though popular in the creepiest Appalachian folk music, it never has seen much fame outside of older folk music.