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'),Įven so, PUMA will only re-verify the DLL signature after a system restart.īecause of that, and because Dolby Digital Live / DTS Interactive settings are used regardless of the DLL being loaded, Patch the kernel to permanently enable unsigned drivers.Īlternatively, here is another modification that does not require breaking the driver signature, and instead modifies one of the user-mode DLLs, Test-sign the driver and enable Test-mode.ģ. Press F8 before each boot and select 'Disable driver signature enforcement'.Ģ. This is an unsigned driver, you must do one of the following for the driver to load:ġ. Windows Vista / 7 / 8 - 32 bit and 64 bit - R2.71 M1: Windows Vista / 7 / 8 - 32 bit and 64 bit - R2.73 M1: Download Realtek HD Audio Codec Driver and replace the relevant file with the file provided:
