As famous composers might have written it. From Gustav Mahler to Glenn Miller, Beethoven to Bizet, and performed by the University of NSW Symphony Orchestra. Listen to it, and you too will realise that there's such a thing as genetically-engineered music.
(Seen via a comment on LGF)
Then there´s the inimitable way Rolf Harris renders it, which is in a class of it's own. Thank God.