Audio Issues on PC

So I have a GTX 1080 and I7-7700k and I use obs whenever I wanna stream. When I dont have OBS open in this game everything runs perfect. Frames stay in the 120-144 range. However, when I open OBS(with out even streaming or recording) everything stays the same except for the audio. Randomly it will cut out. Sometimes really fast or sometimes for a few seconds. I tried changing in game graphics settings, OBS settings and it still happens randomly. Framerate still as high as it is before opening OBS. The weird thing is that I have had the audio cut out but I can still hear other players in game chat while the actual game audio is cut out. This has never been an issue for any game of mine. Any suggestions>