My setup is Samsung KS 55800 HDR TV, Sky Q 2TB & Beam, tried HDMI ARC but had sync issues, now connected from TV One connect to Beam using Optical, still seeing some sync issues. Sky Q set to PCM or bitstream makes no difference, TV settings the same. Dolby Digital selected on Sky & TV to get Dolby 5.1 or 2.
Samsung HDR Blu Rays no sync issues at all so it points to Sky Q I think.
Is there anything else I can do?
I can send diagnostics if Sonos support can take a look?