this is always
BAD DRIVERS shit the company software BAD FOR USER
is i haveonboard motherboard intel original with the
SOUNDMAX 
is install ORIGINAL DRIVER IS NO AC3/DTS TO SPDIF OUTPUT!!!
search to install
old version driver by original company from older year IT GIVE SPDIF OUTPUT but broken no correct sending of ac3/dts HAVE TO RE-START THE MOVIE 2-3 times and then its detect correctly ac3/dts & AND AT THE SAME TIME SPDIF IS OUTPUT i have the sound coming out in deskstop speakers! at same time, but i say ac3/dts not good signalled --- BAD DRIVERS .
search to install and new
driver by OTHER COMPANY SOFTWARE REALTEK GIVE ME SPDIF OUTPUT WITH AC3 AND DTS. but not sound in speakres desktop no no. only spdif sound.
BAD DRIVER BAD PROGAMMING