I agree that these are all old. I also agree that it is unlikely that we will ever know the oldest Euro song. A big part of the problem is that people would often not write down what was a part of their daily lives. As Child said: The rude utterances of the common folk. How far back does Gilgamesh go? If you don't mind slipping over to the other side of the supercontinent, how far back do the Indian (Aryan pre-migration) and Chinese recorded songs go? Mea culpa, I have no answers, only questions.