audio sounds weird

I don't know what to say about it, but the audio absolutely should NOT sound like this. It's very clearly different from when I'm playing the game versus when it's recorded. I keep trying to find people having the same issue but it's either resolved by some stupid mistake that I've checked and...

Ok, so Ive been streaming on twitch recently and ive noticed that my mic audio is completely fine, but for some reason my desktop audio sounds like quiet and low pitched sort of? Idk how to explain it but Ive tryed everything and it didnt work. Please help!