Yu11375...The extent to which the Play/Movie embellished Mozart's life is debatable. That it did so to some extent is true. All stories on historical characters are "improved" a bit to make them more interesting, and this one is no worse than most. The one thing that really deviated from fact is the matter of Constanze, his wife. In life she was an talented pianist, and after Mozart's death she made a good living touring Europe and playing his work.
There is some historic record suggesting that Mozart suffered from Torette syndrome, as portrayed in the movie, and a rumor has been around for hundreds of years regarding Salieri's guilt in his death. Perhaps just a rumor, but it does make a great movie.