Franz Xaver Gerl low vocal range; Branscombe (1991) observes that the very low notes that Mozart included in the part of Sarastro have been "the despair of many a bass singer since." By 1787 he had joined the theatrical company of Emanuel Schikaneder, for which he sang the demanding role of Osmin in Mozart's opera "The Abduction from the Seraglio" and other roles. In 1789 the troupe settled at the Theater auf der Wieden in Vienna. Gerl participated in a system of joint composition used by Schikaneder's troupe, in which "Singspiele" were produced rapidly by having several composers collaborate. As such, Gerl may
Mozart, l'opéra rock je passe"). The scene moves to Antonio Salieri, walking with Rosenberg, the Steward to Emperor Joseph II, and Gottlieb Stephanie, a librettist who has recently finished his piece "The Abduction from the Seraglio". Rosenberg tells Salieri of the newcomer, Wolfgang, and his aspirations of composing a German opera, which Rosenberg then proceeds to mock for its lack of eloquence. Upon the appearance of the Emperor, Rosenberg attempts to discourage him from choosing Wolfgang as the composer for his commission on the basis of his desire to use German instead of the more traditional Italian. Rosenberg explains that Wolfgang insists on