Buzzer to complete a song played a pretty good program.

实验04 控制交流蜂鸣器演奏乐曲
.............................\A51
.............................\...\main.asm
.............................\...\main.LST
.............................\...\main.OBJ
.............................\...\Music
.............................\...\Music.hex
.............................\...\Music.INC
.............................\...\Music.lnp
.............................\...\Music.M51
.............................\...\Music.Opt
.............................\...\Music.plg
.............................\...\Music.Uv2
.............................\...\Music_Opt.Bak
.............................\...\Music_Uv2.Bak
.............................\C51
.............................\...\main.c
.............................\...\main.LST
.............................\...\main.OBJ
.............................\...\Music
.............................\...\Music.h
.............................\...\Music.hex
.............................\...\Music.lnp
.............................\...\Music.M51
.............................\...\Music.Opt
.............................\...\Music.plg
.............................\...\Music.Uv2
.............................\...\Music_Opt.Bak
.............................\...\Music_Uv2.Bak
.............................\...\STARTUP.LST
.............................\...\STARTUP.OBJ
.............................\实验原理图.pdf
.............................\实验说明.pdf
.............................\数据手册
.............................\........\世上只有妈妈好.gif
.............................\........\化蝶.mht
.............................\........\小燕子.mht
.............................\........\红星歌.mht
.............................\........\钢琴音阶频率图.jpg
.............................\........\频率－初值表.txt

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