PDM mic processing

Hi Dialog,

At the moment I work with audio acquisition system, that consist of two PDM microphones and DA14695.

At the moment it continiously stream data (PDM clock 2MHz, sample rate 16000, bit depth 16) from dev_out.memory_param.buff_addr[0] (only one mic at the moment) to the USB-CDC. I transform received data by ffmpeg with flags -f s16le -ar 16000 -ac 1. Resulted data is too quiet.

When I transform data with flags -f s16be -ar 16000 -ac 1, sound loudness is good, but it have a lot of distortion sometimes.

So, my question is: what is the endianness of data in SRC memory buffer? If it is LE, how to increase sound level? In case of BE, how to remove distortion?