If you read my last post I said this:
Audio is going to be very low level , maybe 1V pk to pk. I didn't see an amplifier on that board the chip is a comparator not an amplifier so good luck measuring 500 with your analog input. I estimate the highest value you'll see is 200. If you decide to build an audio pre-amp with op amps I can help you with that. I have a schematic I can post if you need it. Or you could get this:
or this:
But instead, you bought a microphone with no amplifier so your back to the same issue I was addressing with the above comments. You need an amplifer. You should have got the one I suggest with the LM358 amplifier chip. Sorry Mate , but you haven't gained anything with your latest purchase.