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M2TECH HiFace Two R USB Hi-End SPDIF Output Interface (RCA)
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USB Sound Card Audio Adapter w/ Mic - USB Audio Adapters | StarTech.com Mexico
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ultraDigital 1.5 - USB to SPDIF and i2s converter – Small Green Computer
USB-SPDIF Interface – [180027] | Elektor Magazine
Aurender UC100 USB to SPDIF Converter at Sight+Sound Gallery | an Audiophile's Paradise
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Matrix Audio X-SPDIF 2 USB Interface
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Peachtree Audio X1 Asynchronous USB to SPDIF Converter - Black - weboptimizers testing
When to use a USB to S/PDIF converter? | Darko.Audio