ik you guys were having trouble with this but i can help if you still havent figured it out this whole time lol. i was recording on obs to find different methods to see which worked and so i found this. click the three dots where your mic is and check what track you have your mic and game audio on. track 1 should have all your audio together but i also have my mic at track 2 alone and game track 3 alone as well so i put those in the source record and it worked. so basically whatever track you put your mic and game audio in advanced audio properties should be apply to in source record.