Audio Is Wrong

[GimmeDaMic]

Okay, my motherboard is the Abit NF7-S. I have my headphones connected to the audio ports on the back of my computer. Now, for some reason, it's trying to send to a center channel I guess when there isn't one. For example, when I am playing Halo, if I shoot my gun, the sound of it is really low. When people talk to me, their voice sounds very low, except for Cortana, she's loud like normal, but that's cuz she's "in my head", not in the center channel. I can't figure it out for the life of me.

[Hi Ho]

Go into the sound settings and change it to headphones. It's trying to send sound to rear speakers, a sub, and a center.