I've tried doing research about this thing but I don't really understand it yet
it probably needs a password or code of some sort

no problem!! :)

yeah, now try replacing the "message" in the chapter 4 link with that (no spacebar)

you can make it show up naturally if you hold the left arrow key, btw

it's a keyboard layout
try experimenting with turning the "m.ogg"s into a qwerty keyboard input
then try shifting that around