So for someone who doesn't have the assumed pre-existing knowledge, where does one go to initially find said files to extract? all I'm aware of is subscribe and extract and I've been struggling to find where to even extract from. as a result, I'm stuck at the point of subscribe and cannot continue to make sure this plays out.

Extract the files to the sounds/player/survivor/voice/ gambler folder in your l4d2, then run snd_rebuildaudiocache from the ~ console

What should I do if the audio sounds extremely slow/glitchy?
(It happened to me before, with other mods)