Several flutes were discovered in the cave in Ulm. Together with the rock music mentioned above,this suggests to me that this cave was the site of an early folk club. I suspect that Neanderthals were not invited to the Homo Sapiens folk clubs as their heavy barrel-chested build meant they sang so loud that they would have drowned out the other singers. Mind you, Neanderthals did have extremely large nostrils which would have been handy for playing those nose flutes so perhaps they started their own breakaway folk clubs? This could explain why Homo Sapiens and Neanderthals never got it together, with the result that the latter eventually died out.