How did Christoph Willibald Gluck use “oriental” instrumental effects in his comic operas?

Christoph Willibald Gluck incorporated "oriental" instrumental effects into his comic operas, specifically Le Cadi dupé (1761) and La Rencontre imprévue (1764), to provide them with particular charm.1

These effects were often associated with the use of Janissary music, a style derived from the military music of the Turkish Janissary corps. This genre became popular in 18th-century European opera for its "exotic colour," characterized by the use of various drums, bells, cymbals, and the triangle. By integrating these percussive elements, Gluck and other composers of the era sought to evoke an exotic atmosphere within their theatrical works.21