Byrd is an expert in ancient Indo-European linguistics, and for his recording, he edited and recited his own version of a reconstructed PIE fable that is known as 'The Sheep and the Horses,' as well as a version of a Sanskrit story called 'The King and the God,' the Huffington Post reported.
The audio sounds like a guttural mix of German, Arabic and Sanskrit.
Byrd told The Huffington Post that his recording of 'The Sheep and the Horses' was "an approximation" of what PIE must originally have sounded like.
He said that the language that he created may have been spoken between 4,500 and 2,500 B.C is largely based on knowledge of the texts of ancient Indo-European languages, like Latin, Greek and Sanskrit.
He added that languages differ on how they pattern their sounds together and that they use those sounds to create new words. Proto-Indo-European is very guttural.