I built my new PC, Everything works perfect except this damn sound issue I'm having. My Asus Commando motherboard came with detachable onboard sound that resembles a PCIE slot, i had it set up and plugged in my front header "HD Audio" headphone/mic plug into the connector inside my case on the detachable card. I plugged in my headphones and i hear sound I'm suppose to, but also a faint hissing noise. theres no hissing noise when i plug my headphones in the back of my case though for the speakers.

 

The Hissing noise happens with i change a window, or drag a window, or even when i move my mouse. It changes its pitch to depending on i don't know what. but its always pretty faint. I plugged in my other Plug other Audio Plug that my case came with a "AC 97" and its the same deal, i hear sound, but also the faint hissing.

 

I took off the case front panel, and unplugged the wire to my front panel mic jack, and plugged it back in to see if it was a loose connection, nope, everything was fine, and it didn't fix my problem. Still hissing.

 

So i bit the bullet and bought a Creative Labs Xfi XtremeGamer PCI sound card to solve the problem. I Detached the other sound card, disabled it in the bios, deleted all of its drivers/software, and installed my brand new Xfi! I plugged in the HD Audio plug in the the Xfi for my front header headphones and VOILA! I still get the hissing noise, along with the regular sound im suppose to get...

 

I tried muting my LINE IN, MICROPHONE, and others, still hissing.

 

What in the world is the hissing from. :( >_< >_<

Try another PCI slot?

I just did that, nada. no luck thus far.

 

I really have tried everything i can think of. I even disabled the USB and IDE light that are located near the Headphone and mic jack. this is really weird.

It sounds like an issue with that hd audio front jack.