Mozart:  "Why didn't they come?" Salieri:  I think you overestimate our dear Vieneese, my friend. Did you know that you didn't even give them a good bang at the end of songs to let them know when to clap?" Mozart: "I know, I know. Maybe you should give me some lessons in that."

Salieri lets Mozart know that he has to make his compositions easier for the Viennese to understand