The white muslin dress with yellow overdress worn by the farmhouse servant is the same costume Kate Winslet (Marianne Dashwood) wears during the picnic scene in Sense and Sensibility (1995), and Michelle Ryan wears during the scene in which Sir Thomas asks Maria if she wants to marry Mr. Rushworth in Mansfield Park (2007).
Ludwig van Beethoven: Ries, you interfering insect! What is it?
Reis: Herr Haydn is here, sir.
Beethoven's assistant was Ferdinand Ries, pronounced "Reese." The name was pronounced correctly in the film but incorrectly spelled "Reis" in the film credits. It was Ries himself who told the story of his incorrectly thinking the horn player came in early.