text: Under the teaching of Gluck, Marie Antoinette developed into a good musician. She learned to play the harp, the harpsichord and the flute. She sang during the family's evening gatherings, as she had a beautiful voice. All her brothers and sisters were involved in playing Gluck's music; on 24 January 1765 her brother Leopold II, Holy Roman Emperor directed one of Gluck's compositions, Il Parnaso confuso.
  In Spring 1774, she took under her patronage her former music teacher and introduced him to the Paris public. For that purpose, she asked him to compose a new opera, Iphigénie en Aulide. "Mindful of the Querelle des Bouffons between adherents of Italian and French opera, she asked the composer to set the libretto in French." To get to her goals she was assisted by the singers Rosalie Levasseur and Sophie Arnould. Gluck had gruff ways, demanding strict adherence from the cast when rehearsing. Gluck told the bass-bariton Henri Larrivée to change his ways. The soprano Arnould was replaced. He insisted that the chorus, too, had to act and become a part of the drama – that they could no longer just stand there posing stiffly and without expression while singing their lines. Gluck was assisted by François-Joseph Gossec, director of the Concert Spirituel. The Chevalier de Saint-Georges attended the first performance on 19 April; Jean-Jacques Rousseau was delighted with Gluck melodic style. Marie Antoinette received a large share of the credit.