Microsoft Xbox 360 Gaming Adapter 5.1 Optical Audio Video HDMI AV Cable OEM | eBay
5.1 Audio Gear Digital Sound Decoder Converter - Optical SPDIF/Coaxial AC3/DTS To 5.1Analog output - support DTS/AC-3/PCM for HD player Blu-ray DVD PS3 PS4 and Xbox 360 Xbox one - Newegg.com
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Best Buy: Sharkoon X-Tatic Pro Real 5.1 Gaming Headset for Xbox 360 and PS3
Freeshipping SPDIF Coaxial to 5.1/2.1 Channel AC3/DTS Audio Decoder Gear Surround Sound Rush for PS3,STB, DVD player, HD player, Xbox 360