code: public void setControlDigits(String forwardDigit, String rewindDigit,
              String pauseDigit)
      {
          this.forwardDigit = forwardDigit;
          this.rewindDigit = rewindDigit;
          this.pauseDigit = pauseDigit;
      }
docs: Sets the control digits for fast forward, rewind and pause.
  
  @param forwardDigit the digit for fast forward.
  @param rewindDigit the digit for rewind.
  @param pauseDigit the digit for pause and unpause.