The French horn (since the 1930s known simply as the "horn" in professional music circles) is a brass instrument made of tubing wrapped into a coil with a flared bell. The double horn in F/B♭ (technically a variety of German horn) is the horn most often used by players in professional orchestras and bands. A musician who plays any kind of horn is generally referred to as a horn player (or less frequently, a hornist).