Newbie asks "How Do I Install Sound Mods"

Hey guys, so I just started modding and successfully installed Beardlib and BLT. But I previously thought that sound mods go in the BLT mods folder, although it doesn't work for me, at all. I'm stumped and really couldn't find any answers. Now I have modded games before, but modding Payday 2 is much different than games like Oblivion and such. Any help would make me glad.
Replies
That doesn't work. Wanna know why? Because every time I try to install any sound mods I get told the same thing and it never works. Because it doesn't replace anything. Because it does. not. work.