Hello,I'm using an STM32 M4 for recording short audio signals through the I2S interface and I write the PCM to an SD card. To check that everything is fine I have recorded pure tones (1kHz or 2kHz). By doing that I noticed in some recordings (not all...
As you can see in the picture, the higher part of the sinusoid signal is getting wrecked in the highest part, but it appears in the lower part (so the information is still there).This happens when the magnetic field is strong enough (We are putting a...