5.1 Audio does not work

[toleda]

Where did I say anything about optical audio and HMDI audio is related.

Thread title: 5.1 Audio does not work
and
Post #7

The computer/High Sierra sees the HDMI as 6 channels. However, the sound is NOT 6/5.1 channels

and
Post #8

Mac OSX cannot see the optical output.

A criticism?
Post #9

Optical will not work until you install onboard audio.

No, a fact.