When Mozart was writing his opera Idomeno, his father warned him to make sure it was accessible to all the audience. Mozart replied:
As far as the so-called Popular style is concerned, don’t worry about it; in my Opera you’ll find Musick for every kind of listener = except for those with the long ears [i.e., asses].
In an letter to his father,Munich 16 December 1780. Cited in:Spaethling, Robert (2000) Mozart’s Letters, Mozart’s Life. London: Faber and Faber, p.221.