Pay attention to the new Bluetooth audio standard "LE Audio"!

The most important evolution in Bluetooth 5.2 is support for "isochronous transfers". Isochronous transfer is a connection format that guarantees the minimum amount of data transfer in a certain period of time. Introducing "LE Audio" that operates with Bluetooth Low Energy The function that makes use of this isochronous transfer is the "LE isochronous channel", which is the basis of LE Audio. Traditional Bluetooth audio (Classic Bluetooth A2DP) defines only a one-to-one relationship, but LE Audio also allows one-to-many audio playback (multi-stream audio). Multi-stream audio consists of one sender device (source device) and one or more receiver devices (sink devices), and can transmit multiple independent audio streams in synchronization. With this feature, you can use multiple Bluetooth earphones at the same time without delay. Audio playback that uses multiple audio streams, such as so-called 3D audio, will also be possible with Bluetooth devices. LE Audio also has the concept of "broadcast". Like a broadcasting system, audio can be played using one source device and many sink devices, so multiple people can listen to the voice / audio of one person as in an English class, and the music on one smartphone. It is suitable for applications such as playing in multiple rooms. This broadcast can be open so that anyone can listen to it freely as long as it is within the communication range, or it can be closed so that only a sink device with a set passcode can participate. Compared to traditional Bluetooth audio, it should be much more versatile.

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