Called by the endpoint when a new media transport is
        available

def _notify_media_transport_available(self, path, transport):
        """
        Called by the endpoint when a new media transport is
        available
        """
        self.source = BTAudioSource(dev_path=path)
        self.state = self.source.State
        self.source.add_signal_receiver(self._property_change_event_handler,
                                        BTAudioSource.SIGNAL_PROPERTY_CHANGED,  # noqa
                                        transport)