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Xfinity TV Audio Issue Troubleshooting - Xfinity Support
https://www.xfinity.com/support/articles/troubleshooting-audio-issues-with-xfinity-tv#:~:text=Access%20the%20TV%20Adapter%27s%20or%20TV%20Box%27s%20main,No%2C%20your%20current%20volume%20settings%20will%20be%20retained.
Manage Audio Mode in the X1 Guide - Xfinity Support
https://www.xfinity.com/support/articles/x1-audio-output
Restore the Default Audio Language. Press the xfinity button on your remote. Highlight Settings (the gear icon) and press OK on your remote. You can get to Audio Language (SAP) Reset from Device Settings > Audio, Language, or Accessibility Settings. Highlight one of them and press OK on ... Go down ...
Solved! - Audio out settings on comcast box | Tom's Guide ...
https://forums.tomsguide.com/threads/audio-out-settings-on-comcast-box.215414/
Nov 12, 2010. #2. L-PCM tends to be the preferred setting, as HDMI-connected tv's can freak out using Comcast's AC3 signal. There has to be a key on the remote to switch the soundbar to optical. Also, and this is more comon than you think, make sure the dust cap plugs have been pulled off both ends of your optical cable.
Manage Audio Mode in the X1 Guide – Xfinity
https://www.xfinity.com/support/articles/x1-audio-output?view=app
Use the down arrowon your remote to choose HDMI Audio Outputand press OK. Use the down arrowon your remote to choose Stereoor Auto Detectand press OK. Digital Audio Output: Optical/SPDIF (Stereo or Dolby Digital 5.1) Use the down arrowon your remote to choose HDMI Audio Outputand press OK.
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