Does anybody know how to get the files of a steam downloaded pack?, it doesn't appear in the folder

[Evilrymon224]

i recently downloaded a few packs but a couple of them I'd like to give a little tweak, 1 I found online so i was able to download that and edit it but the other is just on steam and i'd like to make a sound in particular added by the pack a bit quieter but I can't get to the files