"The history of hominids making music goes back well more than 100K years; physical media has only existed for the last 147 of them"
That’s a hell of a gap from, say, Beethoven’s death in 1827. So how do we know what Beethoven wrote? Simple, we have the physical media he wrote his music on, all those years ago.
I know that’s not the whole story. The didgeridoo is at least 1,000 years old and is capable of such a variety of sounds, I cannot imagine how music for it can be written as a score. It is played using "circular breathing" where the mouth breathes out while the nose breathes in, The drone effect is modulated by the player "talking", which can sound percussive. For real percussion, it can be beaten with sticks! Magical