28733, Digital to Analog Audio Converter, Black

Dual Profile, PCie, Dolby Digital 5.1, 24bit, S/PDIF optical out

Virtual 7.1-channel surround sound USB audio adapter with Optical S/PDIF out

StarTech.com 7.1 USB Audio Adapter External Sound Card with SPDIF Digital Audio - External USB Laptop Sound Card

USB Stereo Audio Adapter External Sound Card

StarTech.com 5.1 Channel PCI Surround Sound Card Adapter - PCI Sound Card - 5.1 Sound Card - Audio Card - Computer Sound Card

StarTech.com 7.1 Channel Sound Card - PCI Express - 24-bit - 192KHz - SPDIF Digital Optical and 3.5mm Analog Audio

USB 7.1 Adapter External Card, White

Virtual 7.1-Channel USB External Sound Card