def prepareMP3(self, event):
     if event in CUSTOM_MP3_EVENTS:
         if not ResMgr.isFile('audioww/%s.mp3' % event):
             LOG_ERROR('SOUND: mp3 file is not exist',
                       'audioww/%s.mp3' % event)
         else:
             WWISE.WW_prepareMP3('%s.mp3' % event)