What is Digital Coaxial Audio? How to connect?

Digital Audio Extender Over Cat5 J-Tech Digital

Digital Coaxial Audio Video Cable to 3.5mm Auxiliary Input Adapter Jack Male 150cmx1cmx1cm

QED Performance Digital Audio 1.0m, Cables

ROOFULL Optical-to-Coaxial OR Coaxial-to-Optical Digital Audio Converter, ROOFULL Bi-Directional Digital Coaxial to/from Optical Toslink SPDIF Audio Converter/Adapter/Repeater – ROOFULL Official Website

Samsung TV: Do You Need a Digital Audio Out Optical Cable?

Digital Audio Converter, 1-way, Connection input: DC Power / HDMI™ Input, Connection output: 1x Coax Audio / 1x TosLink Female, Automatic

2-way Digital SPDIF (Coaxial Toslink) Audio Converter - from LINDY UK

DEDALUS COAXIAL - Hi-End Coaxial Digital 75 Ohm RCA Hi-Fi Cable - Ricable - Connect Your Passion

Gadgetsonic Digital Coaxial SPDIF Cable 3.5mm Male Audio Jack To RCA For Stereo Music Soundbar Home Theatre Amplifier

Audio Authority 977TPO Coaxial to TOSLink Optical Digital Audio Converter