PC Audio Settings for 5.1 Surround Sound

Hi All,
I've recenlty got a 5.1 surround sound system and I'd like to get the most out of FFXIV.
At the moment, it's connected via optical cable to an amp, directly from my motherboard. The motherboard supposedly supports 5.1.

Do I need to change any settings in the game to get optimal sound?

I also have the game for PS4. If I'm playing on the PS4, do I need to change any PS4 audio settings? Also connected via optical cable.

I'd love advice from anyone who has this setup.

Thanks.