An electronic keyboard (also called digital keyboard, portable keyboard, or home keyboard) is a type of electronic or digital keyboard instrument.〔British Patent no. 1,509,530 by Nicholas K. Kirk filed 19th. Nov. 1974. - Apparatus for recording and replaying music.〕
Broadly speaking, the term ''electronic keyboard'' or just ''keyboard'' mostly refers to any type of digital keyboard instrument. These include synthesizers, digital pianos, stage pianos, electronic organs and music workstations. However, in true musical terms, an electronic keyboard is a simpler type of synthesizer equipped with built-in speakers and capable of recreating a wide range of instrument sounds with less complex sound synthesis, as well as an integrated accompaniment or backing track function. Electronic keyboards are usually dedicated for home and non-professional users, and has lower cost than synthesizers.
The major components of a typical modern electronic keyboard are:
*Musical keyboard: The white and black piano-style keys which the player presses, thus connecting the switches, which triggers the electronic note or other sound. Most keyboards use a keyboard matrix circuit to reduce the amount of wiring that is needed.
*User interface software: A program (usually embedded in a computer chip) which handles user interaction with control keys and menus, which allows the user to select tones (e.g., piano, organ, flute, drum kit), effects (reverb, echo, telephones or sustain), and other features (e.g., transposition, an electronic drum machine)
*Computer assisted rhythm and chord synthesis/Computerized musical arranger: A software program which produces rhythms and chords by the means of computerized commands, typically MIDI. Electronic hardware can also do this.
*Sound generator/sound chip: An electronic sound module or a musical synthesizer typically contained within an integrated circuit or chip, which is capable of accepting MIDI commands and producing sounds.
*Amplifier and speaker: an internal audio amplifier built to the circuit and low-power speakers that amplify the sounds so that the listener can hear them.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』