I read a similar topic where a user was initially unable to select multichannel audio under the device setup for an HDMI output, which was resolved following the rollout of a fix.
I have the same issue but for the optical output (labelled ALC888 Digital). I can select multichannel audio for the HDMI output, but unfortunately this doesn’t help me as I have an older receiver that has optical and coax digital audio inputs only.
The audio works fine apart from this. Is this a bug, or is there a setup step I missed somewhere? If it’s relevant I’m running RoonBridge on a Zotac Z-Box which hosts Libreelec. Any help appreciated.