自己制作的钢琴校音软件。钢琴校音系统包含“钢琴校音系统”和“钢琴校音系统（音叉测试版）”两个版本。其中，钢琴校音系统”是专门为钢琴校音而制作的软件-Piano tuner software to produce their own. Piano school sound system includes a " piano tuner and piano tuner system (tuning fork test version)," two versions. Which,