I am not a video expert. I used to be an audio engineer (like a 1000 years ago) and have done some video editing on my own professional grade editor for giggles but not in the last 10 years.
And yet, I am seeing something that makes me curious. So I thought I would finally ask.
I get cable over OTT via a Roku. Periodically, on channels that have minor packet loss, I have noticed that ads will lose any actor voice and the voice over portion of the content. The background and other sounds are there. Just the voices are missing. For example, an ad for a popular insurance company will have all the background sounds, however, the voice of the person in the video and the voice over announcer are gone. This does not happen for shows. It also does this for most any ad periodically and inconsistently. The same insurance ad can show again in the next ad block just fine. One ad can be missing voices, the next ad is fine, then the third ad is missing the voice. This can happen on any channel from time to time and seems to be tied to very minor packet loss. Basically, the channel is working just fine, just very minor periodic packet loss. This may be a hint.
Strange huh? Any ideas? It is not really a problem for me, just a curiosity. In fact, it is kind of nice so I am not really complaining.