Garry's Mod Voice Chat help

Hello! I have been looking through threads just like this, but haven’t fixed it yet. Maybe you guys can help me!

So, when I connect my mic then set it as default in steam and Windows, I do the test and it works perfect. But I can’t talk in game. I am holding x (my voice chat key). I have tried to restart my PC, restarting the game, changing the mic, and nothing works. When I hold down x, I see the little box, but when I talk nothing happens. I am using a Blue Snowball, And Realtek Headset. Please help!!!