A French horn is a brass musical instrument with a long, coiled tube that ends in a wide, flared opening called a bell. The player holds the horn with one hand inside the bell and presses valves with the other hand to change notes. French horns produce a warm, mellow sound that can be both powerful and gentle, making them essential in orchestras and concert bands.

The instrument got its modern shape because early horn makers coiled the long tube into circles so musicians could carry and play it more easily. Before valves were invented, horn players could only play certain notes, so they had to insert different lengths of tubing (called crooks) to change keys. Modern French horns have valves that do this job instantly.

It evolved from hunting horns that nobles used to signal to each other during hunts. Composers love writing for the French horn because it can blend beautifully with other instruments or stand out with heroic, soaring melodies. In an orchestra, you'll typically see four French horn players sitting together, their bells pointed toward the back of the stage.

Playing the French horn is considered one of the more challenging brass instruments because the player's hand position inside the bell affects pitch and tone, and getting a clean sound requires excellent breath control and precision.