Based on the 51 single-chip, with no delay in a different frequency with different buzzer sound, the sound of

实验4 模拟音乐-世上只有妈妈好\STARTUP.A51
.............................\STARTUP.LST
.............................\STARTUP.OBJ
.............................\音乐.c
.............................\音乐.LST
.............................\音乐.OBJ
.............................\音乐1
.............................\音乐1.hex
.............................\音乐1.lnp
.............................\音乐1.LST
.............................\音乐1.M51
.............................\音乐1.OBJ
.............................\音乐1.plg
.............................\音乐1.uvopt
.............................\音乐1.uvproj
.............................\音乐1_uvopt.bak
.............................\音乐1_uvproj.bak
实验4 模拟音乐-世上只有妈妈好

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