Sound problems? Only on Garrys Mod

Hey Guys, I had a windows update a few days ago which updated my sound drivers, and ever since my sound on Garrys Mod seems very bad quality than normal, everything else is fine. Rather than hearing the sound clearly, I kind of hear a large blast of sound.

I have tried on window and full screen mode, my config is high quality and headphones. It happens on all maps, in single and on multiplayer. I don’t play other games enough to test it, however, Killing Floor seems normal. Music on the internet is fine, and normal.

Any suggestions?