Abstract: A broadcast device configured to broadcast audio streams according to a wireless communications protocol for playout at a plurality of remote devices. Each audio stream comprises audio data arranged in audio frames. The broadcast device is operable in a plurality of retransmission modes. The audio frames are rebroadcast more frequently in one retransmission mode than another. The broadcast device comprises a controller configured to, for each audio stream: (i) select a retransmission mode based on the audio source of the audio data of that audio stream; and (ii) select an audio frame to be rebroadcast according to the selected retransmission mode. The broadcast device also comprises a transmitter configured to rebroadcast the selected audio frame.