code: def oops(self):
          '''Out Of Phase Stereo effect. Mixes stereo to twin-mono where each
          mono channel contains the difference between the left and right stereo
          channels. This is sometimes known as the 'karaoke' effect as it often
          has the effect of removing most or all of the vocals from a recording.
  
          '''
          effect_args = ['oops']
          self.effects.extend(effect_args)
          self.effects_log.append('oops')
  
          return self oops(self):
          '''Out Of Phase Stereo effect. Mixes stereo to twin-mono where each
          mono channel contains the difference between the left and right stereo
          channels. This is sometimes known as the 'karaoke' effect as it often
          has the effect of removing most or all of the vocals from a recording.
  
          '''
          effect_args = ['oops']
          self.effects.extend(effect_args)
          self.effects_log.append('oops')
  
          return self
docs: Out Of Phase Stereo effect. Mixes stereo to twin-mono where each
          mono channel contains the difference between the left and right stereo
          channels. This is sometimes known as the 'karaoke' effect as it often
          has the effect of removing most or all of the vocals from a recording.