The Digital Audio Converter allows one (1) source of digital audio signal in either coax (S/PDIF) or optical (TOSLINK) and convert into an optical or a coax signal simultaneously.  It supports most standards used to transmit two channels of uncompressed lossless PCM audio or compressed 5.1/7.1 surround sound such as Dolby Digital Plus or DTS-HD High Resolution Audio (multichannel digital audio Dolby Digital® 5.1, DTS, and Dolby® True HD).
 
Convert TOSLINK fibre optic digital audio signal to COAX
Convert COAX digital audio signal to fibre optic TOSLINK