Of 4,500-year-old music, that is. Maybe. At least you can get a sense of the sounds that musical instruments from Sumer were capable of making by watching this YouTube video.

I haven’t been able to discover the basis on which the music itself was composed, and I can’t claim to know anything about ethnomusicological investigations of ancient Sumerian music.

There’s also a brief clip of someone playing the Ur harp reconstruction while another narrates Gilgamesh, but the narration is in English, not Sumerian.