What codec does LE Audio use?

LC3 is the mandatory CODEC specified by the BT SIG but it is possible to use other 3rd party codecs if and when they become available. This is similar to how SBC was the mandatory codec for Classic Audio but 3rd party codecs such as APTX and LDAC could also be used.

For a codec to be used, both ends of the connection need to support the 3rd party codec, if not they will fall back to LC3 which must be supported by all devices.