I'm using a KY-038 for sensing sound if I connect the DO pin and set the potentiometer to the highest viable sensitivity then if I make a loud sound it detects and sends an output upwards until 1023. But, as I understand from the schematics of KY-038, only the DO is amplified but not the AO.
So, if I make a sound then the AO does have an effect but since it's already oscillating between 523-534 when no audible sound is present, I cannot detect it because that effect is way too small. Like, it may jump to 540 or maybe 500 but I can't really check for it in code because it's just such a little difference. Also, the idle sound level also sometimes changes its range slightly like instead of going 523-534, it'll do like 512-527 etc.
So, how can I amplify the signal from the AO so that it can detect sound more prominently? Would love it if you could provide clear instructions. (Also, have seen this answer already but the amplification doesn't seem to work )