Weird Audio Issue...Dual Boot System

[punchiest]

I have a Sierra machine with the iMac 14,2 setup that dual boots Win 10 on a Designare 170x MOBO
They are two separate physical hard drives.

When I first installed Sierra, the "Internal Speakers" output worked fine.
Then after I installed Win10, they passed no audio even though the output is still on the list.
Headphones work fine, but there is no audio present on the LINE OUT or INTERNAL SPEAKERS setting.

I am not sure if this has anything to do with the WIN10 install, but it seemed to happen after that.

Anyone ever hear of this?

 

[caubeyeudoi]

Sorry but I am also in your situation. Internal speaker had worked. But when I am boot into Windows 10, then Internal speaker is not working. Headphone is OK, but Internal speaker is not. It has icon can be adjust volumn but no sound. Anyone has any idea?