[Matt Devo]

Nope, there is never any audio after booting up on #225.

Can try #226/#226b tonight and let you know...

Update:
Did clean install of LibreELEC, did not change anything settings except for hostname (LibreELEC-CN65) and enabling SSH, rebooted to upgraded to #226/#226b (bluetooth/PulseAudio, greyed out so cannot change settings), enabled debug logging, and rebooted again.

#226: http://ix.io/1C8j
#226b: http://ix.io/1C8l

 well hello there, troubleshooting section of Kodi Chromebox wiki page...

No HDMI Audio on 2018/Kabylake Chromeboxes:

• the snd_soc_skl audio driver is breaking things, so we need to blacklist it. Open up the 'configfiles' network share on your Chromebox, then the modprobe.d folder. If it doesn't already exist, create a new text file blacklist.conf and add the line 'blacklist snd_soc_skl' to it. Save and reboot the Chromebox.