PUBG on Xbox in stereo question
I have a question I'm hoping someone can clear up. So PUBG on Xbox (on PC & PS4) is in 2 channel stereo. I have a projector and monitor setup, my Xbox is set to bitstream/Dolby out for optical (for my mixamp/headset) and HDMI out set to uncompressed 5.1 (to let my receiver do the decoding). For my headset, if set to stereo then only hear left and right audio, no virtual surround sound. When I play PUBG on the projector/receiver, it only plays from the floor standing speakers, as expected since it's only 2 channel stereo but when I force Dolby or DTS on my receiver, it uses all channels and plays the correct channel. People run behind me, I hear them in the rear speakers. My question is, why is this if the game only uses 2 channel stereo?