The coaxial input is doe digital audio. Both optical and coaxial digital outputs are available on many components. They are not used if you are using hdmi as the connection methoid for your equipment.
If you hook up a component via component or composite for video, coaxial or optical is a better method connection for audio than stanadard analog red/white in terms of audio.
If you hook up a component via component or composite for video, coaxial or optical is a better method connection for audio than stanadard analog red/white in terms of audio.