How can I get my onboard mic to work while I'm using my AMD video card for sound playback?

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http://askubuntu.com – This is a really annoying issue that no one seams to have the answer for. I'm using the audio of my HDMI sound card (Its a Radeon HD 5450) to hear sound and it works when I'm listening to music or watching things online. But while I have that as the default device for playing audio my microphone port on my Gigabyte GA-Z77-DS3H is silent. It registers sound when I look under sound setting, that little orange bar flicks up and down at the strum of a bass note but I hear nothing no matter what I do. If anyone can help I'd be so grateful, thank you. (HowTos)