Keyboard instruments include piano, organ, accordion and electronic keyboard. In the keyboard instrument family, all instruments have one common feature, which is the keyboard. However, their sound production methods are subtly different. For example, the piano is a percussion instrument, while the organ is a reed instrument, and electronic synthesizers use modern electroacoustic technology.

Keyboard instruments are musical instruments with keys arranged like a piano keyboard. Each key on these instruments has a fixed pitch, so they can be used to play any piece of music within their range. There are often syringes or other devices for syringes under the keys. When using a keyboard instrument, the performer does not directly strike the strings of the instrument to produce vibrations, but uses the keys to produce sound through the mechanical mechanism or electronic components within the instrument. Compared with other musical instrument families, it has incomparable advantages in its wide sound range and the ability to produce multiple tones at the same time. Because of this, keyboard instruments have rich harmonic effects and orchestral colors even as solo instruments. Therefore, from ancient times to the present, keyboard instruments have attracted much attention and love from composers and music lovers.

One disadvantage of keyboard instruments is that musicians cannot directly control the articulators, and the pitches of most keyboard instruments are fixed and performers cannot change them, so there are certain limitations on performance, such as the inability to produce portamento. Some instruments use special structures and structures that allow the player to modify the articulating properties of the instrument to a certain extent. The piano can change the sound through the speed of playing, and to a certain extent the timbre through the pedals. The change in tone length is very limited. The sound length of the pipe organ can be directly controlled by the performer, but the sound and timbre can only be controlled indirectly.