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Q Is Samsung’s 2016 Ultra HDTV line capable of passing a 5.1 surround sound signal received from an HDMI input to a Sonos Playbar system via its optical digital audio output? I’ve heard that only Sony and Vizio TVs provide this 5.1 passthrough capability.—Glenn Patton / via e-mail

A It’s true that Sony and Vizio TVs routinely provide passthrough of 5.1 audio from their optical digital audio output. The track record for other brands is more spotty. However, in his recent review of Samsung’s 65KS9800 UHDTV, a 2016 model, Tom Norton was able to confirm 5.1 Dolby Digital, but not 5.1 DTS, passthrough from the set’s optical output. This news bodes well for 5.1 Dolby Digital output capability from the rest of the Samsung 2016 UHDTV line.