When using a keyboard instrument, instead of directly hitting the strings of the instrument to produce vibration, the keys are used to produce sound through the mechanical mechanism or electronic components in the instrument. Compared with other musical instrument families, it has incomparable advantages, which is its wide range and the ability to produce multiple musical notes at the same time. Because of this, keyboard instruments, even as solo instruments, also have rich harmony effects and orchestral colors. Therefore, since ancient times, keyboard instruments have attracted the attention and love of composers and music lovers.

The electric piano is an electroacoustic instrument. It is a kind of instrument used to replace the piano in some occasions, which rose in the 1960s and 1970s and was popular from the 1980s to the early 1990s.