Gilbert-Louis Duprez (6 December 1806 – 23 September 1896) was a French tenor, singing teacher and minor composer who famously pioneered the delivery of the operatic high C from the chest (Ut de poitrine, as Paris audiences called it).
He studied singing, music theory, and composition with Alexandre-Étienne Choron and made his operatic début at the Odéon in 1825 as Count Almaviva in Rossini's Il barbiere di Siviglia.
His Italian reputation strongly established, Duprez returned to Paris in 1837 and scored an immediate success at the Opéra with his exciting new style of vocal delivery as exemplified in William Tell.
After singing in London at the Drury Lane theatre in the years 1843–1844, Duprez began to cut back on his stage performances, with a notable exception being the lead role in Giuseppe Verdi's Jérusalem.
In his 1880 book Souvenirs d'un chanteur, Duprez, a close friend of Donizetti's, related in deeply felt terms the bitter setbacks and obstructions which the Bergamo composer had suffered in the theatrical world.
Donzelli possessed a robust voice and a deliberately darkened timbre, coupled with firmly accented diction, immense nobility of phrasing and a vibrant, intense method of acting.
The dramatic tenor of the present day is a direct descendant in terms of range, tessitura and tonal thrust from this kind of mid-19th century voice first exemplified by Duprez.