What was the first song ever invented?

There's actually no real answer to this question. Music is basically every sound. The first song was invented by the first human being to ever step foot on Earth. By them speaking or making grunting sounds, or ANYTHING really, was considered song. Every sound is a song. No, that's not a metaphor, it's scientifically true. Me typing on my keyboard right now is considered a song just for the simple fact that as I type, I'm making a noise. Hope I gave you some helpful information!

-Anonymous Scientist (: