说明：  /本例采用89C52, 晶振为11.0592MHZ //关于如何编制音乐代码, 可以看以下代码. //频率常数即音乐术语中的音调,而节拍常数即音乐术语中的多少拍
(/ 89C52 used the cases, crystal-11.0592MHZ// Music on how to prepare code, can see the following code.// Frequency is constant music terms of tones, rhythms and music that is constant terms of the number of shoot)