Hi. I recently built a new computer with an ASRock Z77 Extreme 4 motherboard and Gigabyte Radeon HD 7950 GPU running Windows 8. Up until yesterday I hadn't used the HDMI port and only had run audio from the front or back panel out to my speakers or headphones with no problems. Today I ran the HDMI cable to my TV which worked fine but no matter what I do (disabling HDMI, updating driver, etc.) I can't seem to get any audio out of my speakers or headphones. I'm stuck and hoping someone can point me in the right direction.