USB 6-Channel Surround Sound Converter With 5.1 Surround + Optical Audio Out | eBay
USB 5.1 Windows and Mac Audio Converter | CNAweb
External 5.1 Channel USB 2.0 Sound Card Optical Audio Adapter - Black - Free shipping - DealExtreme
Digital 5.1 Audio Decoder Dts/Ac-3 Optical To 5.1-Channel RCA Analog Converter Sound Audio Adapter | Fruugo AE
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
SGEYR 5.1 Audio Converter Game Console Adapter Gold Plated Audio Jack 2xRCA(L/R) Jack and 3x3.5mm Jack Bidirectional Conversion| | - AliExpress
DAC Digital to Analog Decoder Adapter 5.1 Audio Gear Sound Converter for PC DVD | eBay
DAC Audio Digital to Analog Converter, Digital DTS Channel Decoder 5.1 Audio Converter Optical Fiber Coaxial Sound Adapter for PS3 HD DVD PS4: Amazon.com: Industrial & Scientific