Wet slappy sound coming from engine at low RPMs when accelerating.

[Shinare]

OK, so after hearing it more clearly when beside McDonnalds in the drive through (sound reflecting off the side of the building) I've been trying to reproduce the sound every day as I go through the drive-through. After doing so, I think I have figured out what it is. Although from the interior of the car it sounds faint and "wet and slappy" as you might expect if you were to make a fart sound between with your mouth by blowing air between your cheek and teeth, from the outside it sounds "chirpy" and seems to be in line with what my daily belt squeal sounds like that happens when I start my car.

Yes I know that means a loose belt, and if I hadn't already tightened the darn thing 4 times to the best of my strength and a healthy pry bar on the alt, along with spraying that "no squeal" spray on the belt and pullys, I'd say you were right. But it seems no matter what I do (even buying two more of the same belt from AutoZone) it squeals. I've kinda just lived with it.