A foot pedal is a device that is typically used in musical instruments, such as pianos or organs. It consists of a metal bar connected to a mechanism that raises and lowers when pressure is applied by pressing down with one's foot. The purpose of the foot pedal is to allow musicians to control certain aspects of their instrument while playing, such as volume or tone, without having to remove their hands from the keys. In some cases, it can also be used for other purposes, like starting and stopping a recording device in audio production.