Turtle Beach upgrades, iterates USB soundcard line, adds optical output for true 5.1 surround | Engadget
Usb Digital Sound Card Optical Digital Output For Sale in Foxrock, Dublin from sunnyrainbow
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USB Audio Adapter External Sound Card - USB Audio Adapters | Ireland
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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
Roland - UA-25 | USB Audio Interface
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Optical Audio Output External Sound Cards for USB 2.0 for sale | eBay
Sound Blaster Omni Surround 5.1 5.1 Sound card, external Digital output, External headphone jacks, External volume contr | Conrad.com
UA-1EX | USB Audio Interface - Roland
External Usb Sound Card With Analogue Stereo And Optical Digital Audio Output in Carlow Town, Carlow from Optiwire
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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