Having Issues with multiple audio drivers getting audio sync issues.

hey guys. I recently been having so many problems with audio sync issues when mounting a 3D image. Video plays fine in my media player. (have tried totalmediatheater and poweriso11 seems to be the best so far). anyway it seems like it plays fine in 2D but 3D is giving it audio sync issues. I think ive pinpointed the problem and ive found that disabling my motherboard audio driver (intel) and enabling nvidia audio seems to have a better effect in 3D playback (again mounting). ive tried a few different 3d image backups by the way, i also didnt have a problem with intel hd drivers playing 3D but intel drivers started to give me a BSOD which lead me to buy a nvidia card for 3D. So back to the issue. Is there a way to have both audio drivers installed becuase I switch from tv to monitor for display and I have external speakers that I would like to use instead of my tv audio. I also have the latest nvidia drivers, chipset drivers, directx and most up to date bios. im running windows 7 64bit, gigabyte mobo, geforce gt 520, 12gb ram, intel i5 2500. Also says nvidia hdmi output not plugged in, in windows sound properties if someone can explain that. sorry for such a long typed problem.

I have to enable intel driver then reboot so I can use my external speakers, any easier way without rebooting and keep switching audio drivers.