LE Audio: what it is, how it works and what it does

Definition and Context

LE Audio is a low-power audio specification designed for devices using Bluetooth technology. According to available evidence, this technology is part of the audio capabilities supported in version 5.4 of Bluetooth, operating alongside Auracast and Classic Audio.

Architecture and Associated Profiles

The operation of LE Audio is based on a set of specific application profiles that define how audio and device control are managed. Key profiles associated with this architecture include:

• BAP (Basic Audio Profile): Basic audio profile.
• CAP (Common Audio Profile): Common audio profile.
• HAP (Hearing Access Profile): Hearing access profile.
• PBA (Public Broadcast Audio Profile): Public broadcast audio profile, related to Auracast.

These profiles coexist with other classic audio and control profiles, such as A2DP 1.3, AVRC 1.6, HSP 1.2, and HFP 1.7, within the same connectivity ecosystem.

Scope and Applications

The presence of LE Audio in a product indicates that the device is compatible with Bluetooth version 5.4 and supports advanced audio profiles. This enables applications such as low-power audio transmission, hearing aid access, and public audio broadcasting (Auracast), improving energy efficiency and functionality in audio devices and accessories.

Limitations

Available information is limited to the enumeration of supported profiles and the Bluetooth version. Specific performance metrics, backward compatibility with earlier Bluetooth versions, or hardware restrictions are not detailed in the provided evidence.

Interpretation in Products

When the LE Audio label is found on a product, it can be interpreted that the device implements the Bluetooth 5.4 low-power audio specification. This implies support for profiles such as BAP, CAP, HAP, and PBA, enabling modern and efficient audio functions, differentiating it from devices that only support Classic Audio or earlier Bluetooth versions.