Assistive Listening Knowledge Base
  • Specification

Broadcast Audio URI, version 1.0

From https://assistivelisteningknowledgebase.org/evidence/bluetooth-sig-2024-bau/ · record checked 13 October 2026

  • Bluetooth SIG Hearing Aid Working Group
  • Bluetooth SIG

Standards body (Bluetooth SIG, an industry association funded by its member companies, which owns the Auracast trademark)

Summary

Defines the text carried in Auracast QR codes and NFC tags that tells a phone or other assistant which broadcast, and which stream in it, to join.

Key findings

  • The text starts with "BLUETOOTH:UUID:184F;" followed by labelled fields. The broadcast name is mandatory, and the Broadcast Code must be included when the streams are encrypted, so the code itself carries the decryption key.
  • Printed codes should rely on values that do not change: the Broadcast_ID is normally fixed for the life of the device, while random device addresses usually change about every 15 minutes and belong only in codes that can be regenerated.
  • A code can select one stream within a broadcast, such as one language, or leave the choice to the listener's assistant app, so codes with different content can lead to different choices on screen.
  • A static code does not show that the transmitter is switched on or within range; assistants that can scan should check that the broadcast is present and tell the user when it is not.
  • The Version History records Board adoption of version 1.0 on 10 September 2024. The abstract describes out-of-band delivery of broadcast-selection information to a Broadcast Assistant or GATT Client, including through QR codes.
  • Section 3.6.1 describes display clutter from multiple stream choices and metadata that directs an assistant to a particular BIG or subgroup. Sections 5.3-5.4 leave confirmation and alternative-option displays to implementations; a URI can identify one language or omit it so the assistant uses a preferred language or offers discovered choices.

Limits

Defines a data format, not how venues should place or check codes. Support in phones and hearing-aid apps varies.

Read the original

www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/BAU_v1.0/out/en/index-en.html

Link checked . We link to the original and do not host copies.

Cited in

Cite this source

Bluetooth SIG Hearing Aid Working Group. Broadcast Audio URI, version 1.0. Bluetooth SIG. 10 September 2024. https://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/BAU_v1.0/out/en/index-en.html (accessed 13 October 2026).

The accessed date is when this library last checked the link; use the date you read it. To point readers to this summary instead, link to https://assistivelisteningknowledgebase.org/evidence/bluetooth-sig-2024-bau/

Every finding here cites its source, and who funded each source is labelled. This site does not recommend products. Found an error or a missing study? Suggest a correction.