Hi,
I was able to unlock the Realtek HD Audio driver, and make both Dolby Digital Live and DTS Interactive available.
(Note: DTS Interactive is marketed as DTS Connect when bundled with DTS Neo: PC)
Unlocked options you will get:
- Dolby Digital Live
- DTS Interactive
- Dolby Home Theater (Dolby Virtual Speaker for 2 speakers, Dolby Pro Logic II for >2 speakers)
- DTS Neo: PC
This will work on ANY Realtek HD Audio codec. (Edit: Excluding ALC2xx under Windows 7)


Unlocked Drivers:
Download Realtek HD Audio Codec Driver and replace the relevant file with the file provided:
Windows 2000 / XP / 2003 - 32 bit and 64 bit - R2.71 M1:
http://www.sendspace.com/file/ohd11k
http://www24.zippyshare.com/v/78849394/file.html
Windows Vista / 7 / 8 - 32 bit and 64 bit - R2.73 M1:
http://www.sendspace.com/file/zrwyeh
http://www20.zippyshare.com/v/2155117/file.html

Windows Vista / 7 / 8 - 32 bit and 64 bit - R2.71 M1:
http://www.sendspace.com/file/m59vre
http://www24.zippyshare.com/v/34731542/file.html
Note for 64-bit Vista / 7 / 8 users:
This is an unsigned driver, you must do one of the following for the driver to load:
1. Press F8 before each boot and select 'Disable driver signature enforcement'.
2. Test-sign the driver and enable Test-mode.
3. Patch the kernel to permanently enable unsigned drivers.
Alternatively, here is another modification that does not require breaking the driver signature, and instead modifies one of the user-mode DLLs,
Unfortunately, usually Windows PUMA (Protected User Mode Audio) will check the digital signature of the user-mode DLL and will refuse to play ('Failed to play test tone'),
even so, PUMA will only re-verify the DLL signature after a system restart.
Because of that, and because Dolby Digital Live / DTS Interactive settings are used regardless of the DLL being loaded,
you can still replace the DLL and go to Control Panel > Sound, set the output format to Dolby Digital Live / DTS Interactive, and then switch back to the original DLL,
the Dolby Digital Live / DTS Interactive output setting you have set will still be in effect, even after a reboot.
Windows Vista / 7 / 8 - 32 bit and 64 bit - R2.71 A1 (Alternative method):
http://www.sendspace.com/file/7xp03j
If you have issues:
Please Report:
- OS (including whether it's 32-bit or 64-bit)
- Motherboard
- HD Audio Controller Hardware ID (You can find this in device manager, see image below)
- HD Audio Codec Hardware ID (You can find this in device manager, see image below)