The LE 10.80.0 (Nexus) images in my team share https://chewitt.libreelec.tv/testing/ contain an experimental fix from Martin B for "the noise" that can be experienced with GXBB, GXL and GXM devices using the AIU audio driver. If you have an S905, S905X/D/W/Y or S912 device; please reduce volume on your TV or AVR, update the image, then spend a few minutes navigating around and fiddling with switches and options in the Kodi audio settings page (normally an easy way to provoke that audio problem). Please post back with success or reports of 'the noise' or crackling or other audio oddities you experience?
NB: These images have partially workiing hardware decode again, using the same ffmpeg patch-set as Raspnerry Pi. This is progress, but it means playback is worse in real-terms since ~50% of things now fail, whereas recent images had software-only decode (completely broken hardware decode) where 100% of 1080p media plays within CPU limits. TL/DR; If you're trying to run these images for daily use, you probably want to disable hardware decoding.