Hi, I have read on the specs, that from LG C8 versions on, Atmos passthrough via Dolby Digital Plus it is available via HDM Arc. This allows to use Dolby Atmos from Netflix from the TV through compatible sound bar. My question is for previous year model, B7D/V and I guess A, do they have a firmware update that enable to do passthrough via Dolby Digital Plus, so Atmos can be used in compatible sound bar? Thanks!