What is the oldest known musical instrument?

The oldest known musical instrument is the bone flute, which dates back over 40,000 years. The flute was discovered in the Hohle Fels cave in Germany, and it is made from the hollow bone of a griffon vulture. Other ancient musical instruments include the bullroarer, which is a flat, rectangular piece of wood that is swung around on a string to produce a humming sound, and the lithophone, which is a musical instrument made of stones that are struck to produce musical tones. The oldest surviving stringed instrument is the lyre, which dates back to ancient Mesopotamia around 2,500 BCE.