def stream_url(self):
    '''stream for this song - not re-encoded'''
    path = '/Audio/{}/universal'.format(self.id)
    return self.connector.get_url(path,
              userId=self.connector.userid,
              MaxStreamingBitrate=140000000,
              Container='opus',
              TranscodingContainer='opus',
              AudioCodec='opus',
              MaxSampleRate=48000,
              PlaySessionId=1496213367201 #TODO no hard code
    )
stream for this song - not re-encoded