Noise observed in recorded file with AFE code

[nsoni]

HI @Ohtokani_Pinzón 

As mentioned in another post, I am opening separate issue for noise in recorded file with AFE code. We are using imx8m-plus EVK kit along with 8MIC-RPI-MX8 mic board. We see the noise in arecord file (once in 10 or 15 minutes) in latest/previous AFE sample code.

Below are the steps :

1.   modprobe snd-aloop

2.   ./afe libdummy & 

3.   aplay audio-sample.wav -c2 -r48000 -fS32_LE &

4.   arecord -d10 -fS32_LE -r48000 -c1 audio-sample-2.wav

Here is the attached recorded file with noise.