Here may be related an incident at the rehearsal of the work, which proves the dramatic significance Gluck sought to impart to his music. In the second act, while _Orestes_ is singing, "Le calme rentre dans mon coeur," (Once more my heart is calm), the orchestral accompaniment continues to express the agitation of his thoughts. During the rehearsal the members of the orchestra, not understanding the passage, came to a stop. "Go on all the same," cried Gluck. "He lies. He has killed his mother!"
Gluck's enemies prevailed upon his rival, Piccini, to write an "Iphigénie en Tauride" in opposition. It was produced in January, 1781, met with failure, and put a definite stop to Piccini's rivalry with Gluck. At the performance the prima donna was intoxicated. This caused a spectator to shout:
"'Iphigénie en Tauride!' allons donc, c'est 'Iphigénie en Champagne!'" (Iphigenia in Tauris! Do tell! Shouldn't it be Iphigenia in Champagne?)
The laugh that followed sealed the doom of the work.
The Metropolitan production employs the version of the work made by Richard Strauss, which involves changes in the finales of the first and last acts. Ballet music from "Orfeo" and "Armide" also is introduced.
The operas of Gluck supplanted those of Lully and Rameau. Those of Mozart, while they did not supplant Gluck's, wrested from them the sceptre of supremacy. In a general way it may be said that, before Mozart's time, composers of grand opera reached back to antiquity and mythology, or to the early Christian era, for their subjects. Their works moved with a certain restricted grandeur. Their characters were remote.
Mozart's subjects were more modern, even contemporary. Moreover, he was one of the brightest stars in the musical firmament. His was a complete and easy mastery of all forms of music. "In his music breathes the warm-hearted, laughter-loving artist," writes Theodore Baker. That is a correct characterization. "The Marriage of Figaro" is still regarded as a model of what a comic grand opera, if so I may call it, should be. "Don Giovanni," despite its tragic _dénouement_, sparkles with humour, and _Don Giovanni_ himself, despite the evil he does, is a jovial character. "The Magic Flute" is full of amusing incidents and, if its relationship to the rites of freemasonry has been correctly interpreted, was a contemporary subject of strong human interest, notwithstanding its story being laid in ancient Egypt. In fact it may be said that, in the evolution of opera, Mozart was the first to impart to it a strong human interest with humour playing about it like sunlight.