Position Slider
  The Position slider indicates the current position in the
  recording.  In the following figure, the current position is the
  start of the recording:
    
  When you are making a recording, the Standby label is
  replaced by a Recording...  label.  When you are playing a
  recording, the label is replaced by a Playing...  label.
  Additional topics:
  *   DECsound Control Panel
  *   Overview of DECsound