code: def is_playing_radio(self):
          
          response = self.avTransport.GetPositionInfo([
              ('InstanceID', 0),
              ('Channel', 'Master')
          ])
          track_uri = response['TrackURI']
          return re.match(r'^x-rincon-mp3radio:', track_uri) is not None
docs: bool: Is the speaker playing radio?