BLE Audio

[Clemint]

Hello

We would like to evaluate your STM32WBA55G and nucleo-WBA55CG boards for a project. So we have several questions:

• Is it possible to stream BLE audio between two STM32WBA55G boards by taking the sound from the Mems microphone and streaming it to the pc via the USB port (We could see the live audio of the audacity) If so, what examples should we use in your codes?
• Is it possible to do the same thing but having the nucleo connected to the PC and which to recover the audio in BLE. We would have the card STM32WBA55G further away that would be streaming the audio by picking up the audio from its microphone
• Is it possible to connect a STM32WBA55G to an nRF5340 Audio via BLE audio?
• When will you have the final documentation for the software and hardware of the STM32WBA55G board?

Kind regards

[TMANE.1]

Hello, 

I guess you are speaking about the STM32WBA55G-DK1 board. 

So here are few answers

• It depends on your needs: current projects don't use the MEMS but drivers support it. You could update the application to source audio from the MEMS. However, the most difficult part is the connection to the PC since the WBA55 doesn't support USB protocol. The USB connector is for the STLink and maybe the VCP (UART) could be used to send audio to the PC, but it's a non-synchronous, non-audio standard and baudrate limited bus. Either PBP (simplest) or TMAP (in media mode) could be used as a starting point. 
• Same problem as above: you can remove BSP from the DK project to use on a Nucleo board however the connection to the PC is the trickiest things 
• Yes, they are interoperable (at the protocol level) but the application may need to be adapted
• Hardware files are present on the ST website: STM32WBA55G-DK1 - Discovery Kit for BLE Audio with STM32WBA55CGU6 - STMicroelectronics
• Software information regarding BLE Audio could be find on the ST wiki page: Introduction to Bluetooth® Low Energy Audio - stm32mcu 

Best regards,