The Digital Audio Converter allows one (1) source of digital audio signal: coax (S/PDIF) or optic (TOSLINK) to be converted to an optic or a coax signal respectively. 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).