code: def channels(self, n_channels):
          '''Change the number of channels in the audio signal. If decreasing the
          number of channels it mixes channels together, if increasing the number
          of channels it duplicates.
  
          Note: This overrides arguments used in the convert effect!
  
          Parameters
          ----------
          n_channels : int
              Desired number of channels.
  
          See Also
          --------
          convert
  
          '''
          if not isinstance(n_channels, int) or n_channels <= 0:
              raise ValueError('n_channels must be a positive integer.')
  
          effect_args = ['channels', '{}'.format(n_channels)]
  
          self.effects.extend(effect_args)
          self.effects_log.append('channels')
          return self channels(self, n_channels):
          '''Change the number of channels in the audio signal. If decreasing the
          number of channels it mixes channels together, if increasing the number
          of channels it duplicates.
  
          Note: This overrides arguments used in the convert effect!
  
          Parameters
          ----------
          n_channels : int
              Desired number of channels.
  
          See Also
          --------
          convert
  
          '''
          if not isinstance(n_channels, int) or n_channels <= 0:
              raise ValueError('n_channels must be a positive integer.')
  
          effect_args = ['channels', '{}'.format(n_channels)]
  
          self.effects.extend(effect_args)
          self.effects_log.append('channels')
          return self
docs: Change the number of channels in the audio signal. If decreasing the
          number of channels it mixes channels together, if increasing the number
          of channels it duplicates.
  
          Note: This overrides arguments used in the convert effect!
  
          Parameters
          ----------
          n_channels : int
              Desired number of channels.
  
          See Also
          --------
          convert