Changing jack headset properties

Hy there.

I have jack headphones and sometimes when I wanna listen to the computer when i'm connecting headphones the sound is a surrounding one. Can I change the properties of it?
I mention I inserted them in the keyboard slot, but if I insert them to the PC the sound is good.


Thanks in advanced.
 
You mentioned you plugged the headphones into your keyboard. Could you provide the details of your motherboard?
 
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