i have a amp who can decode dolby digital, dts ... if the sound track is in stereo , it works of course. But it it's 5.1 / DTS, multichannel, AAC in pass through, noise, and if i disable it no sound at all.
For the record , with the android 7.0 image for pineh64, with the kodi apk on the same board, pass through is working well, kodi too.
So i have some hope that someone can fix the issue one day on librelec