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
Il finto astrologo times was produced in Fermo in 1988. The finale of the first act (that describes the imaginary travel of Buonafede to the Moon), has been described as "a typical opera buffa jewel". Il finto astrologo Il finto astrologo is an intermezzo by composer Niccolò Piccinni. The opera uses an Italian language libretto by Carlo Goldoni. The work premiered at the Teatro Valle in Rome on 7 February 1765 with a cast that included the famous castrato Venanzio Rauzzini as Clarice. "Il finto astrologo" is derived from "Il mondo della luna", a libretto originally set to music by Baldassare Galuppi in