docs: def fader(self, value: int):
          """Move the fader to a new position in the range 0 to 1023."""
          self._fader = int(value) if 0 < value < 1024 else 0
          self.outport.send(mido.Message('control_change', control=0,
                                         value=self._fader >> 7))
          self.outport.send(mido.Message('control_change', control=32,
                                         value=self._fader & 0x7F))