Sound problems on a single channel
Boston area: for a few days now all programming on the Smithsonian channel - both regular (193) and HD (1477) - has been unwatchable due to sound problems. The video is fine, but dialog is unintelligible - high pitched and extremely fast - and there is continuous /loud/ clicking in the background. It's like listening to Alvin & the Chipmunks with the record skipping.
The problem is ONLY on the one channel (Smithsonian) - all other channels are fine. It is on all TVs, not a problem with a single box. Resetting the boxes does not help - I have tried both electronic "refresh" and removing power / rebooting. The boxes all are X1 if that matters.
Is anyone else experiencing this? On any channel? I haven't tried calling support yet because it /looks/ like a problem with the broadcast rather than an issue with my equipment ... but it has continued for so long now that I have trouble believing Xfinity would be unaware of a broadcast problem.