noisy audio recording after averaging data

[FTEHR.1]

I am using F446 board with CCA02m2.

when I just send the audio to USB output, I can record data in audacity. But if I do simple processing such as averaging data, the output is high clipped data.

I checked the data range and overflowing. there is no problem in this case.

Is there any advice here?

[waclawek.jan]

Yes. Recheck the data range and overflowing.

Instead of using real audio source, try some artifical data e.g. sawtooth.

JW