The playback system consists of the following parts: sound source part, control part, signal transmission part, terminal sound part, which generally includes DVD, cassette, MP3 player and mobile player and other equipment.
Control part: including the partition, timing player, IP broadcast host and other devices, complete the timing control of music processing, playback mode, such as the whole area play, partition play, point-to-point play, service broadcast and other function control. Signal transmission and terminal sound understanding is relatively simple, generally including speaker line or network cable or other transmission lines. The sound is the common wall mounted sound, outdoor sound, waterproof sound column, lawn sound and so on.