Amazon.co.jp: StarTech.com 7.1ch USB to DAC Headphone Amplifier S/PDIF Compatible 8x 3.5mm Mini Jack 2x 3.5mm Toslink Square Connector ICUSBAUDIO7D : Electronics
ZOOM U-44 USB AUDIO INTERFACE 4x4, mic/line in, S/PDIF I/O, MIDI I/O, modular mic options
ICUSBAUDIO2D - StarTech.com USB Sound Card w/ SPDIF Digital Audio & Stereo Mic - External Sound Card for Laptop or PC - SPDIF Output (ICUSBAUDIO2D) - sound card - Currys Business
Sound Town UHF 16 Channels Wireless Microphone and Karaoke Mixer System with Digital to Analog Audio Converter, Supports Smart TV (SPDIF Toslink Optical and Coaxial to RCA) - Walmart.com
USB 6Channel 5.1 Optical SPDIF External Sound Card Audio Adapter for PC Win Mac | eBay
DBX 376 Tube Mic Microphone Preamp digital spdif | eBay
RDL HRDSX4 Digital Audio Distributor, AES/EBU And S/PDIF | Full Compass Systems
How to Use the Optical Out (S/PDIF) Port on Your PC - The Tech Edvocate