* [[Keyboard controller (computing)]], a computer hardware which connects a keyboard to the main board
A '''keyboard controller''' is musical [[keyboard instrument]] that does not produce any sounds of its own. It is like a keyboard [[synthesizer]] minus the synthesis circuits, or [[sound module]]. It sends [[MIDI]] note data electronically to an external sound module, a synthesizer, or even a computer or [[music sequencer]]. In this way a keyboard controller can be used to take the place of several separate instruments.
* In music, a [[MIDI keyboard]] with some additional controls
{{disambiguation}}
A controller is used to "play a computer" as the sound data is not on the actual controller. The controller uses data on a computer to create sound, hence the term, "controller". With the controller one controls his or her computer, and plays music through it.
Controllers come in many variations, and send out data through a MIDI cable or [[Universal serial bus|USB]]. Through this the controller is connected directly to the computer, allowing the user to control the computer musically.
