Amazon.com: StarTech.com USB Sound Card w/ SPDIF Digital Audio & Stereo Mic – External Sound Card for Laptop or PC – SPDIF Output (ICUSBAUDIO2D),Black 0.6" x 1.8" : Electronics
Realtek Optical Output Problem, for windows audio team. - Microsoft Community
Premium Full HD 1080p Android WIFI 3D HDMI Network Media Player Realtek RTD1186DD 750MHz Chipset
Realtek onboard SPDIF no sound output (for HDMI passthrough).
SPDIF not output multichannel audio (Realtek ALC887 Asus Vanguard B85) - Linux Mint Forums
Unlocked Realtek HD Audio Drivers for Windows 10 (Dolby Digital Live/DTS Interactive) | Page 11 | TechPowerUp Forums
The Ultimate Realtek HD Audio Driver Mod for Windows 10 | TechPowerUp Forums