Creative Sound Blaster Omni Surround 5.1 USB Sound Card with High Performance Headphone Amp and Integrated Microphone : Amazon.co.uk: Computers & Accessories
CERRXIAN PCIe Sound Card, PCI 5.1 Express Audio Card for PC Windows 98/2000 / XP / win7 : Amazon.co.uk: Computers & Accessories
CM108 USB Drive Free USB Sound Card Laptop Computer External Sound Card Module | eBay
Sound card - Wikipedia
Does a motherboard have a built-in sound card? - Quora
Product | StarTech.com 7.1 Channel Sound Card - PCI Express - 24-bit - 192KHz - SPDIF Digital Optical and 3.5mm Analog Audio (PEXSOUND7CH) - sound card
What is a sound card? Everything you need to know - SoundGuys