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Sandeep_k
Associate III
September 19, 2025
Solved

STM32WBAG-DK1 PBP source multichannel creation for Auracast

  • September 19, 2025
  • 12 replies
  • 1150 views

Hi,

I am try to STM32WBAG-DK1 PBP source example and try to create multi-channel and stream the data through it. Like in each channel, each language. I got stuck where to modify the code.

Could anyone please support the issue.

 

Thank you

Best answer by TPITEL

Hi,

First of all, as of today, the libraries used in this project are limiting the number of BIS to 2, meaning you'll only be able to support 2 different languages at the same time. We plan on supporting more BIS in future updates.

To broadcast 2 different languages starting from the current PBP Source application:

  • Set the BROADCAST_SOURCE_NUM_BIS to 2, BROADCAST_SOURCE_CHANNEL_ALLOC_1 to FRONT_LEFT and BROADCAST_SOURCE_CHANNEL_ALLOC_2 to FRONT_RIGHT. This will permit to broadcast left and right channels on 2 different BIS
  • Edit the PBPAPP_SetupBASE so that instead of having 1 subgroup with 2 BIS, you have 2 subgroups with 1 BIS per subgroup. This will permit to annonce to remote Broadcast Sinks that the 2 BIS contain 2 different content. You'll find more info about BASE structure on our wiki page.
  • Send audio through 3.5mm jack input with your first language on the left channel and the second language on the right channel
  • On the PBP Sink side, when calling PBP_PBK_StartBIGSync, only synchronize to one of the 2 BIS by setting the NumBIS to 1 and setting the right BIS in the bis_index.

If you can wait until then, we plan on releasing a stm32-hotspot github project containing a PBP Source app with 2 languages, along with an app able to synchronize to it and switch languages. It should be available in a few weeks.

Best Regards,

Tom.

12 replies

Show previous replies
S
Sandeep_kAuthor
Associate III
October 8, 2025

If I use STM32WBA65I-DK1 board, by enabling or using UAC (USB), can I stream multiple audio files for auracast application.

 

S
Sandeep_kAuthor
Associate III
October 13, 2025

Hello,

If I use STM32WBA65I-DK1 board, by enabling or using UAC (USB), can I stream multiple audio files for auracast application, like each audio file for each channel or subgroup? If yes, please clarify how to do it orelse suggest some other board to do the same application.

 

Thank you

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