Tennis Channel 844 - DVR not recording sound

@XfinityMartyR​ , 

Xfinity app navigates to Xfinity Assistant, which is not responsive.

See ‎Xfinity Assistant Overloaded and not Responsive | Xfinity Community Forum

Now, the Assistant progresses to prompts for the typical connectivity diagnostics. That's not relevant, because this is channel specific. 

Hello @user_0810e9!  Thanks for posting on our Xfinity Community forums! 

So you can hear the sound when you play the channel 'live' but not from a recording?

You've also reset and refreshed the TV box itself, do you have any other TV's you could try to connect the TV box to in order to ensure the same problem persists on a different TV? (Just trying to rule out an audio settings issue with the TV itself.)

Also, can you tell us the make and model of the TV and what TV Box model you have?

Have you tried using a different cable to connect the TV to the Box (HDMI, etc?)

Oh, and one other thought @user_0810e9, if your DVR recordings are cloud based, have you tried to view the recording on the Xfinity Streaming App on a different device like a laptop, computer or phone, or smart TV?  If the sound is available on a different device directly, then it would help point us in the right direction as to whether its a channel issue or a hardware issue. 

Yes, sound playing live, but not playing recording. 

'cc' on shows text, but still no sound.

Same problem playing back through xfinity stream app.

Arris Xi6

Model: TX061AEI

Serial: [Edited: Privacy]

Sony XBR-65A8H

Marantz AV 10 (switching preamp) 

This is channel specific. Your diagnostics for non-xfinity hardware and interconnects make no sense.