Turtle Beach upgrades, iterates USB soundcard line, adds optical output for true 5.1 surround | Engadget
USB to coaxial SPDIF optical AC3 DTS 5.1 7.1 converter adapter sound card | eBay
USB Audio Streaming: USBStreamer B
New 1pcs Mini USB Audio Cable Digital Toslink Optical Fiber Audio 1 To 2 Female Splitter Adapter 23CM For Multimedia| | - AliExpress
Digital to Analog Converter DAC USB Optical Cable L/R Audio AUX Speaker 3.5mm Jack Adjustable Volume Control Adapter - Walmart.com
Alpha USB A-B Optical fiber digital audio cable – FibbrCable
Douk Audio U2 XMOS XU208 USB to Coaxial/Optical Converter Digital Inte– doukaudio
Cubilux USB A to TOSLINK Optical Audio Adapter with 192KHz/24bit DAC USB Type... | eBay
Optical vs USB Audio For Hi-Fi headphones - HomeTheaterHifi.com
Amazon.com: USB To Optical Audio Adapter
USB TO SPDIF Converter XMOS XU208 Coaxial Optical Toslink Support Source Output | eBay
USB PC to Optical Audio Converter (up to 192kHz)
Toslink/Coaxial Bi-directional Audio Converter
USB in (for PC) and ST OPTICAL OUT (for DAC) -----> converter | Headphone Reviews and Discussion - Head-Fi.org
LiNKFOR USB to SPDIF Coaxial RCA and 3.5mm Headphone Jack Converter – LiNKFOR Store
Reiyin Usb Dac Toslink Optical Audio Converter Pc Game 192khz 24bit Hifi Music Portable Adapter With Mic - Digital-to-analog Converter (dac) - AliExpress
RME Digiface USB 66-Channel ADAT to USB Optical Audio Interface · AV Gear
Amazon.com: heaven2017 USB 2.0 6 Channel 5.1 Optical Audio External Sound Card for Notebook Laptop PC (Black) : Electronics
Douk Audio U2 USB Converter XMOS XU208 Digital Interface TOSLINK COAX DSD 192KHz | eBay