The key precursor is "Hair." He sees Wolfgang Amadeus Mozart as a spiritual brother of the hippies who thumbed their noses at convention, muddled their senses with intoxicants, and delighted in lecturing their elders. In a film where everybody wears wigs, Mozart's wigs do not look like everybody else's. They have just the slightest suggestion of punk, just the smallest shading of pink. There is something about Mozart's Vienna apartment, especially toward the end, that reminds you of the pad of a newly-rich rock musician: The rent is sky-high, the furnishings are sparse and haphazard, work is scattered everywhere, housekeeping has been neglected, there are empty bottles in the corners, and the bed is the center of life.
The flower child Mozart tries to govern his life, unsuccessfully, by the lights of three older men. His father Leopold trained the child genius to amaze the courts of Europe, but now stands aside, disapproving, at the untidy mess Mozart has made of his adulthood. His patron, Emperor Joseph II passes strict rules (no ballet in operas!) but cannot enforce them because, God love him, he enjoys what he would forbid. Then there is Salieri who poses as his friend while plotting against him, sabotaging