COM Surrogate causes lag on my online game(Ragnarok Online)

I've been having lag on my online game called Ragnarok. I tried to find out what's wrong and I noticed that every time I run Ragnarok, I start to have background process called Windows Audio Device Graph Isolation. After a little bit of reading online, I thought the cause of the lag is the COM Surrogate running that(WADGI) background process. I tried to terminate WADGI at the Task Manager and the lag disappears on my game, but my sounds are completely gone. I really want to have my sound while removing the lag. Does anyone have an idea how to fix this? Thanks.