I decided to test the hidden trace theory that Zenloc and I came up with....
Some of you may recall that my first GCP was without sound, making it a piece of crap sort of. This was because I had cut off too much and broke the sound "somehow". So, I took a few glances at my board, then a few glances at the inner layer shown by Zenloc, and then decided to connect a hidden trace with a single wire. Note, this is the hidden trace that is shown in "red" in the "hidden layers" topic.
I hooked up my speakers and.....THE SOUND CAME BACK!!!!!!!!!!!!!!!!!!!!!!
Pics!!!! Not that pictures show sound

but at least you can see what I had to relocate and how EASY it was!
That red wire? Thats the one. Oh, and ignore all the wire mess; that was just some me being reckless and ripping some things off the board that were kinda important
UPDATE: a cleaner view of the sound fix
Sound fix is done by connecting a wire from the 5v pin of the power pins to the little capacitor shown in the above diagram. Credits to Kasar for the original diagram.