With “assembly”, you mean the available LibreELEC builds? I have tested and reported in the other thread (LibreELEC for Khadas EDGE (RK3399)). The images from @balbes150 worked (mostly) well with wired ethernet and some also with the (rather noisy) Khadas fan, but there was no support for 4k. The sound (and video) issues varied a lot. I had probably best experience with the January build as I have reported: no issues with scrambled noise and seemingly smooth playback even with the most problematic videos, but still occasional audio drop-outs. But I am afraid the dropouts may have lead to lost audio/video synchronization too, after some time - I have not tested everything thoroughly.