简单的电子琴程序，利用51单片机装入该程序即可使用。几首简单儿歌-Simple piano program, the use of 51 single-chip loading, the program can use. A few simple nursery rhymes

朋友们编写钢琴程序时，会用到钢琴音高音源，在此提供两种格式供朋友选择。(When piano programs are written, friends will use the pitch of piano pitch, providing two formats for friends to choose from.)