Issue while recording audio with SAI interface ?

[GUIRAT.Youssef]

Hi ,

I'm doing an audio recording with the SAI interface of the STM32L4R9AI microcontroller.

I'm using DMA in circular mode and I'm getting audio data which I wrote into SD memory.

However, when I tried to open the recorded file , I hear my audio speech with a great noise .

I'm working with these parameters :

• Sampling rate : 48K
• Data per sample : 24 bits
• Audio mode : Mono mode
• Audio protocole : Free protocol

The microphone I'm using is the ICS-43434 which outputs PCM audio frame and supports I2S protocol.

Have encountered such issue before ?

What kind of checks should I do when it comes to audio recording with SAI ?

kind regards,

Elliot

[Imen.D]

Hello,

Do you have this issue with the SAI example available in the STM32CubeL4 firmware package?

Have you proceeded and set-up your board as described in the readme.txt file?

With Regards,

Imen

[waclawek.jan]

> Data per sample : 24 bits

> Audio mode : Mono mode

> Audio protocole : Free protocol

I suspect this is some CubeMX stuff so I wonder what does this exactly mean in terms of SAI registers value and how does it match the microphone's requirement:

JW