The keyboard is a synthesizer also known as the electronic version of the piano designed by the combination and the processes of pressing mechanical keys to produce different sounds by means of electric circuitry and pressure.
The keyboard is designed with capabilities to produce sounds of almost all other instruments, and it’s also used to control dynamics, phrasing, pitch, shading, articulation. The main harmonics produced by the keyboard is that of the known instrument other sounds were made to serve as additional.