The challenge is simple
Go to this website https://www2.iis.fraunhofer.de/AAC/multichannel.html
- Check if your surround setup plays the sound correctly
If it does - Record with OBS
Play with VLC (you have ensured that your VLC can play 5.1 correctly) or possibly other players
- Is the surround still correct? i.e. is the channel mapping is correct - no channels are swapped
Mine is not correct If your OBS records it correctly
please tell me (and others) your settings
Go to this website https://www2.iis.fraunhofer.de/AAC/multichannel.html
- Check if your surround setup plays the sound correctly
If it does - Record with OBS
Play with VLC (you have ensured that your VLC can play 5.1 correctly) or possibly other players
- Is the surround still correct? i.e. is the channel mapping is correct - no channels are swapped
Mine is not correct If your OBS records it correctly
please tell me (and others) your settings