The Neanderthal flute, discovered in Divje babe cave near Cerkno, is the oldest musical instrument in the world, dating back to 60,000 years ago. Made out of the left thighbone of a young cave bear, the flute has four pierced holes, two of which are entirely preserved, and two partly. It was confirmed through musical experiments that the size and position of the holes were deliberately made for musical expression. The flute is unique in that it is the only one that was definitely made by Neanderthals and is about 20,000 years older than other known flutes made by anatomically modern humans. This discovery confirms that the Neanderthals were sophisticated artistic beings capable of music.
https://www.nms.si:443/en/collections/highlights/343-Neanderthal-flute