Among the Western musical instruments, the instrument mainly used to accompany church choirs is the pipe organ. The main musical instrument used in churches to accompany church choirs is the pipe organ. Pipe organs rely on copper or wooden sound pipes to produce sounds. The pipe organ has a loud volume, majestic momentum, beautiful and solemn timbre, and has diverse contrasts, can imitate the effects of orchestral instruments, and can play rich harmonies. In medieval Europe (especially Italy), almost every small town church had a large or small pipe organ. During every religious festival, melodious music could be heard floating throughout the town. Being able to serve as organist in a famous cathedral is also an honor that musicians are proud of.