I am running a WIN XP box at work, with Intel DQ965CO main board.
Sound card seems to be an IDT High Def Audio card.
I have sound coming from my speakers plugged into the rear port. But I also have sound coming from the PC itself.... sounds like from an on-board speaker.
I have tried the following.
Went into the sound card control panel. If i mute the WAVE output, it shuts off the on-board and my speakers.
Disabled the Windows Audio service. When i do that it disables everything.
Got into the BIOS and disabled the peripheral device setting for Audio. Rebooted. Doesn't seem to make a difference.
I have been researching this for hours... but nothing seems to work. Intel has also generously decided to discontinue any type of support for this model of main board.