_:n78f13a81bdf24488b79e3822663c6713xb5
<http://schema.org/text>
"Make sure you are playing a 5.1 source from the Apple TV before you try to change the Digital Output Audio Format setting on the TV. If you are playing a stereo source, it probably won’t let you change the setting."
<https://en.community.sonos.com/home-theater-229129/hdmi-arc-samsung-set-up-unable-to-select-dolby-digital-6884006?postid=16666900>