主要组成是以51单片机最小系统为核心，通过键盘获取按键信息，通过运用单片机定时器等部件实现蜂鸣器发声同时用数码管同步显示。本系统具有播放歌曲及选取按键输入高、中、低音的功能-Major component is the smallest single-chip system as the core 51, ​ ​ access to key information through the keyboard, and other components through the u