COAXIAL TO OPTICAL DIGITAL AUDIO CONVERTER. The perfect solution for converting digital audio media formats. Run out of coaxial digital inputs on your receiver? Most receivers only have one coaxial digital input but have several optical inputs. This coaxial to optical converter will allow you to connect the coaxial digital audio output from your DVD, cable or satellite receiver to a TOSlink optical input. Don’t buy a new receiver – simply change media formats and get full digital signal sound quality.