Help With Soundcard Requirements?

[SkylarMarieRose]

Hello! So I have a pair of LS41 headphones I was given. Issue is they are stereo without an optical port?

Issue is I don't have optical on my board(B450 ROG Strix-I) and as it's ITX I can't expand it.

So I was wondering if anyone knows of a good solid preferably cheaper USB soundcard so I can turn on the "full surround" mode

 

I'm told this makes a giant difference in audio quality having them connected by optical, but if anyone knows better I'm all ears!