Hi.
I own a TX3 mini with S905W, I've installed Libreelec 12.0 on it. Connected to a Kenwood receiver through optical cable.
If sample rate is set to 44.1 or 88.2 there will be popping sounds in audio, this doesn't happen if the sample rate is 48 or 96. Whatever the sample rate is being used in Kodi, my receiver's display always show 44.1khz.
I can provide more log or info if needed. Sorry for bad English and thanks in advance.