Do I need a sound card?

[DDY]

As I continuously plug the headset in and out to try new, potential solutions (such as shifting the sound card around), I once plugged them in the wrong away so that I could only get stereo out of them and not surround and the buzzing was no longer there. I thought the problem was gone, but then I realised my mistake. Just thought I would add that if it helps.

Plugged in the wrong way? How so?

[Zeven]

Plugged in the wrong way? How so?

The shades of pink and orange they use look quite similar in bad lighting. I could have continued using the headset like that but I didn't buy a surround sound headset to use stereo sound.

[DDY]

Sorry, what I meant to ask was; what exactly did you plug in to where when the noise stopped?

[Zeven]

Sorry, what I meant to ask was; what exactly did you plug in to where when the noise stopped?

I did everything the same as usual except for accidentally plugging the pink 3.5mm pin into the orange 3.5mm pin and vice versa. As a result, I could no longer get surround sound.