code: def decode(decoder, data, length, frame_size, decode_fec, channels=2):
      
  
      pcm_size = frame_size * channels * ctypes.sizeof(ctypes.c_int16)
      pcm = (ctypes.c_int16 * pcm_size)()
      pcm_pointer = ctypes.cast(pcm, c_int16_pointer)
  
      # Converting from a boolean to int
      decode_fec = int(bool(decode_fec))
  
      result = _decode(decoder, data, length, pcm_pointer, frame_size, decode_fec)
      if result < 0:
          raise OpusError(result)
  
      return array.array('h', pcm).tostring()
docs: Decode an Opus frame
  
      Unlike the `opus_decode` function , this function takes an additional parameter `channels`,
      which indicates the number of channels in the frame