code: public Note getStringNote(int stringNumber) {
  		if (stringNumber > 0 && stringNumber <= m_strings.length) {
  			return m_strings[stringNumber-1];
  		}
  		else return null;
  	}
docs: Returns the Note for the request string
  @param stringNumber Starts at 1 for lowest string line
  @return a Note object, or null if string number out of
  defined strings