Monster® SACD/DVD-Audio Cable 5.1-channel Interlink® 400 MkII interconnect at Crutchfield
Cheers.US USB 2.0 External 6 Channel 5.1 Optical Audio Sound Card for Notebook Laptop PC - Walmart.com
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Amazon.com: VAlinks USB 2.0 External Sound Card 6 Channel 5.1 Surround Optical S/PDIF Audio Sound Card Adapter for PC Laptop Recording Compatible with Windows 10/8 / 7/ XP : Electronics
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Amazon.com: SGEYR 5.1 Audio Console Adapter Convert Stereo RCA to 3 x 1/8 (3.5mm) Jack Bidirectional Conversion for 5.1 Multimedia Speaker : Electronics