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 live performance effect of piano performance is mostly affected by the sound equipment. If the quality of the microphone responsible for collecting the piano volume is general or not professional enough, the piano timbre we hear on the scene is very difficult to be satisfactory, and the electric piano can be easily connected with the sound equipment such as the mixer at the performance site through an audio output line, and its original timbre is maintained as far as possible.