Hello, I used to have this problem but with wired headphones so I simply switched them backwards so the sound was right. I thought it was faulty cabling. However, I recently bought new wireless Corsair VOID headphones and I built a new pc and I have encountered the same problem. I tried the APO solution but that did not have any effect (I am sure I did it correctly). If there is any other way to switch the left and right sound on windows I am ok with that. I just need the sound to be correct in games. Also, it might just be that I have been playing "backwards" for 5 years so my directional sound is messed up in stereo headphones. I have no idea what the problem is but an adequate fix FOR ME is a simple switch of left and right sound. Thank you so much for your help