There are no data recorded who invented music. It is believed that music was invented then the first humans appear. With their first feelings, with their first face expressions, mimics the music also came. To know which species and how many million years ago they invented music you should see Jacques Malaterre’s documentary movie “A species odyssey”. This movie made in 2003. The movie shows how humans evolved. It is quite easy to predict how many years ago and which species was the first hominids who invented music. In my opinion it was Homo erectus who discovered music about 1.5 million years ago. But maybe you interested just in “who invented music notes” so you can read about it here.
Who invented music