format  void PCM_Start (PcmHn pcm)
 Input  pcm: Handle
 Output  None
 Function value  None
 Function  Playback starts.
 Remarks  Playback can be performed only once for the generated handle.
  If you want to play the same file over and over again, generate a handle each time. 

  format  void PCM_Stop (PcmHn pcm)
 Input  pcm: Handle
 Output  None
 Function value  None
 Function  Stops playback. 

  format  void PCM_Pause (PcmHn pcm, PcmPauseCmd cmd)
 Input  pcm: Handle
  cmd: Control command for pause
 Output  None
 Function value  None
 Function  Pauses playback. Alternatively, cancel the pause.