Tut3

代码说明：

  SOUNDSC(Y,...) is the same as SOUND(Y,...) except the data is scaled so that the sound is played as loud as possible without clipping. The mean of the data is removed.(SOUNDSC (Y ,...) is the same as SOUND (Y, ...) except the data is scaled so that the sound i 's played as loud as possible without clipping. T he mean of the data is removed.)