code: public String getFileName()
  	{
  		if (mp3File==null) return "";
  		try
  		{
  			return mp3File.getCanonicalPath();
  		}
  		catch (IOException ex)
  		{
  			return mp3File.getAbsolutePath();
  		}
  	}
docs: returns the full path of this mp3 file
  @since 26.12.2008
  @return