I’ve been having this issue for quite some time now but was always loathe to tackle it since it is so hard to troubleshoot. When playing music, most of all high-res (24bit) multi-channel audio the music is sometimes but not always accompanied by horrible crackling/distortion. Moreover, any keypress from the IR remote is then also heard as additional crackling. When I stop playback and start it again, crackling may or may not return on next playback… I haven’t found a pattern. I’ve tried all combinations of settings I can think of in Kodi to no avail. It almost feels as if the CPU is not powerful enough to handle the audio when background processes run but that’s just a guess.
I think this started with the 9-series of CE, but not really sure. Any ideas?