Ok so I have an AS Rock Z77 Extreme 4 motherboard, with onboard RealTek audio. When I plug headphones into the case of my computer, the sound quality is horrible. I don't even hear all the sounds, but the headphones work fine with other devices. Now normally my audio is fine, because I have an HDMI connection from my video card to my monitor, and then I've got speakers plugged into the monitor. Everything works fine that way. Its only when I plug in headphones that it sounds really bad. Now, I don't have a sound card. If I were to buy a sound card, would this issue be fixed? Or are my drivers messed up or something for my onboard audio? Need help! Also, If I plug in my Sony wireless Pulse headset into the USB slot, the audio is perfectly normal. Only when headphones are plugged into the headphone jack do they suck. Basically, I just want to hear perfectly normal audio when plugging headphones into the headphone jack, instead of crackling, fading and artifacts.