STM32WBA55G-DK1 Full Duplex Audio Transmit and Receive query

[Sandeep_k]

Hi,

I am using STM32WBA55G-DK1, is it possible to use Audio In jack to send the input audio and at Out to receive the audio in a full duplex method.

Thank you

[TMANE.1]

Hello

Yes, this architecture is possible.

BSP_AUDIO_IN_Init() can be called with device set to AUDIO_IN_DEVICE_LINE_IN (left jack) while BSP_AUDIO_OUT_Init() device is set to AUDIO_OUT_DEVICE_HEADPHONE (right jack). 

From the provided telephony use case on TMAP or HAP (both full duplex), the main change from AUDIO_IN_DEVICE_ANALOG_MIC to AUDIO_IN_DEVICE_LINE_IN is the number of channel that is changed from 1 to 2 channels. So aSrcBuff buffer must be resized and CAP_Unicast_SetupAudioDataPath() must be called with a decimation set to 2 (samples are interleaved Left/Right)

Best regards,

[Sandeep_k]

Thank you...