The phrase "authentic instruments" is correct and usable in written English.
It can be used when referring to musical instruments that are made using traditional methods or materials, often associated with historical accuracy.
Example: "The orchestra performed using authentic instruments from the Baroque period, enhancing the overall sound of the music."
Alternatives: "genuine instruments" or "original instruments".
Some early music ensembles are rather self-righteous about using only historically authentic instruments.
Listen to a Handel recording from, say, the late 1960s done on authentic instruments in an authentic style.
FREE PUBLIC LIBRARY OF ELIZABETH "Inti Raymi: Musica Latinoamericana," a South American folk ensemble using authentic instruments.
With his wife and Kathleen Salmon he formed a trio for the performance of early music on authentic instruments.
The sheep-shearing and ballad-singing also resemble a Cecil Sharp country house party, with the musicians playing quaintly authentic instruments.
Puyana's temperament did not adjust easily to what he perceived as the limitations of such "authentic" instruments, for performances of JS Bach and Domenico Scarlatti in particular.
But the beauty of this machine is the intricate cabinet design, with its gorgeous illustrations and the authentic instrument panel design inside.
The Fab Four, Britain's Finest, A Hard Day's Night and other such look- and sound-alike acts also take audiences on a ride through different periods of the group's seven-year recording career using period-authentic instruments, costumes and hairstyles.
Von Karajan focused on 18th-and 19th-century opera and music, shunned authentic-instrument orchestras, and made the festival a social event for the jet-set.
The American Classical Orchestra was one of the first to use authentic early instruments, reproducing the sound that 18th-century composers meant to be heard.
At Hoyt Farm, which focuses on American Indian life, they can join an archeological dig and a powwow using authentic musical instruments.
