Amazon.com: PROZOR Digital to Analog Audio Converter Support Dolby/DTS Decoder, Optical Out to RCA DAC Decoder, Optical to 3.5mm Converter, Optical/SPDIF/Toslink/Coaxial/DTS/PCM/5.1CH to 2CH Analog Stereo : Industrial & Scientific
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