Gigabyte Z170x gaming7 audio hizzing

[Nanderz0]

every time i would plug in my headphones i would be hearing nothing but hizzing noise. Please help thanks

Specs
Green Case Apevia
Fans 4x120mm with spots up 7 fans
Fans 2 top fans
Fans H55 Corsair liquid fan
PSU EVGA Nex750B
G Skill Ripjaws DD4 2400 16gb ram
500gb WD HDD
Samsung DVD
i5 Skylake 6600k lga1151
HyperX headphones
Samsung 850 ssd 250gb
Gigabyte G1 z170x 7

 

[rgd1101]

MERGED QUESTION
Question from Nanderz0 : "Audio z170x gaming 7"

Green Case Apevia
Fans 4x120mm with spots up 7 fans
Fans 2 top fans
Fans H55 Corsair liquid fan
PSU EVGA Nex750B
G Skill Ripjaws DD4 2400 16gb ram
500gb WD HDD
Samsung DVD
i5 Skylake 6600k lga1151
HyperX headphones
Samsung 850 ssd 250gb
Gigabyte G1 z170x 7

The audio was was working great when i would be using my headphones. Then the audio didnt work anymore it would be making a hissing noise everytime i tried using my heaphones. So now i use a bluetooth speakers.

I had a problem like that.
unplugging, replugging.
changing audio channels.
resetting RAM every once in a while
helped for me.

Do you use the front headphone out or the rear motherboard green hole?