The manufacturing of brass handle valves involves several precise steps to ensure durability and functionality. It begins ...

Brass instrumentslike this trumpet make ... the amountof air that's vibrating is to use something called a valve. On an instrument like the trumpet the player can press three valves.

The french horn (or horn for short) consists of a very long brass tube ... end to change the sound of the instrument, and gets different notes by pressing down valves, which block off holes.