At present, the audio transmission technology on the market is mainly divided into WiFi, Bluetooth, 5G and other several, which can be described as having advantages and disadvantages. First talk about Bluetooth, with the rapid development of Bluetooth technology, Bluetooth transmission bandwidth from the initial 1Mbit/s has been extended to the current 24 Mbit/s, Bluetooth 4.0 bandwidth to transmit high-quality (bandwidth can not transmit lossless) audio is no problem.

    Bluetooth is mostly used for flyer channels and stereo, and there are three audio coding formats: Apt-X, SBC, and AAC. SBC is a general audio format, Bluetooth does not support AAC, aptx are transmitted with SBC, sound quality is general, now 80% of Bluetooth encoding is this format; AAC is used when Bluetooth supports AAC format files and mobile phones also support AAC transmission, and the sound quality is much better than SBC; And Apt-X is one of the best audio encoding format, fault tolerance is good, can reduce the delay to a minimum, to solve the sound intermittent when listening to music, watching movies when the sound is not synchronized and other phenomena, this technology has been applied to many high-quality Bluetooth headphones on the market, in addition to headphones, there are also some smart audio products support Apt-X decoding format, such as: Starloop(star ring audio), sony Bluetooth audio, etc.

    In addition to Bluetooth, the most discussed wireless transmission method on the market is WiFi transmission, WiFi has enough bandwidth to transmit lossless audio to DSP for decoding, and is also the development direction of modern HIFI, so WiFi speakers are superior to Bluetooth speakers from the sound source. There are also products that use WiFi to transmit multiple channels, such as Sonos audio, but this usage is very demanding on the router. We know that WiFi needs to pass through the router to transfer data, the router is shared by multiple Internet access devices, and the bandwidth is dynamically allocated by the router. Therefore, when the playback device needs to be re-played after a period of time, there will be no connection to the receiver, or the need to wait for the router to reallocate the bandwidth, so the use of WiFi to transmit multi-channel audio needs to buy a very good router to match.